diff --git a/scraping.go b/scraping.go
index 10150e6..021f016 100644
--- a/scraping.go
+++ b/scraping.go
@@ -384,13 +384,15 @@ func getFilterResultAverage(filter *Filter) {
 			}
 		}
 	}
-	filter.Results = append(filter.Results, fmt.Sprintf("%f", sum/count))
+	if count > 0 {
+		filter.Results = append(filter.Results, fmt.Sprintf("%f", sum/count))
+	}
 }
 
 func getFilterResultCount(filter *Filter) {
 	var count = 0
 	for _, parent := range filter.Parents {
-		count += len(parent.Children)
+		count += len(parent.Results)
 	}
 	filter.Results = append(filter.Results, fmt.Sprintf("%d", count))
 }
@@ -401,7 +403,9 @@ func roundFloat(val float64, precision uint) float64 {
 		math.Round(val)
 	}
 	ratio := math.Pow(10, float64(precision))
-	return math.Round(val*ratio) / ratio
+	rounded := math.Round(val*ratio) / ratio
+	log.Println(val, precision, ratio, rounded)
+	return rounded
 }
 
 func getFilterResultRound(filter *Filter) {
@@ -419,7 +423,7 @@ func getFilterResultRound(filter *Filter) {
 		for _, result := range parent.Results {
 			if number, err := strconv.ParseFloat(result, 64); err == nil {
 				rounded := roundFloat(number, uint(decimals))
-				filter.Results = append(filter.Results, fmt.Sprintf("%.f", rounded))
+				filter.Results = append(filter.Results, fmt.Sprintf("%f", rounded))
 			}
 		}
 	}
diff --git a/scraping_test.go b/scraping_test.go
index caf9be0..caf6b97 100644
--- a/scraping_test.go
+++ b/scraping_test.go
@@ -251,3 +251,202 @@ func TestFilterSubstring(t *testing.T) {
 		})
 	}
 }
+
+func TestFilterSum(t *testing.T) {
+	var tests = []struct {
+		Input []string
+		Want  []string
+	}{
+		{[]string{"1"}, []string{"1.000000"}},
+		{[]string{"1"}, []string{"1.000000"}},
+		{[]string{"1", "1", "A"}, []string{"2.000000"}},
+		{[]string{"1", "A", "B", "1"}, []string{"2.000000"}},
+		{[]string{}, []string{"0.000000"}},
+	}
+
+	for _, test := range tests {
+		testname := fmt.Sprintf("%s", test.Input)
+		t.Run(testname, func(t *testing.T) {
+			filter := Filter{
+				Parents: []*Filter{
+					{Results: test.Input},
+				},
+			}
+			getFilterResultSum(
+				&filter,
+			)
+			if (filter.Results != nil && test.Want != nil) && !reflect.DeepEqual(test.Want, filter.Results) {
+				t.Errorf("Got %s, want %s", filter.Results, test.Want)
+			}
+		})
+	}
+}
+
+func TestFilterMin(t *testing.T) {
+	var tests = []struct {
+		Input []string
+		Want  []string
+	}{
+		{[]string{"1"}, []string{"1.000000"}},
+		{[]string{"10000"}, []string{"10000.000000"}},
+		{[]string{"1", "2", "3", "4"}, []string{"1.000000"}},
+		{[]string{"2000000", "100000", "A"}, []string{"100000.000000"}},
+		{[]string{"1", "A", "B", "2"}, []string{"1.000000"}},
+		{[]string{"1.1", "0.1", "10"}, []string{"0.100000"}},
+		{[]string{}, []string{}},
+		{[]string{"A"}, []string{}},
+	}
+
+	for _, test := range tests {
+		testname := fmt.Sprintf("%s", test.Input)
+		t.Run(testname, func(t *testing.T) {
+			filter := Filter{
+				Parents: []*Filter{
+					{Results: test.Input},
+				},
+			}
+			getFilterResultMin(
+				&filter,
+			)
+			if (filter.Results != nil && test.Want != nil) && !reflect.DeepEqual(test.Want, filter.Results) {
+				t.Errorf("Got %s, want %s", filter.Results, test.Want)
+			}
+		})
+	}
+}
+
+func TestFilterMax(t *testing.T) {
+	var tests = []struct {
+		Input []string
+		Want  []string
+	}{
+		{[]string{"1"}, []string{"1.000000"}},
+		{[]string{"10000"}, []string{"10000.000000"}},
+		{[]string{"1", "2", "3", "4"}, []string{"4.000000"}},
+		{[]string{"200000", "100000", "A"}, []string{"200000.000000"}},
+		{[]string{"1", "A", "B", "2"}, []string{"2.000000"}},
+		{[]string{"1.1", "0.1", "10"}, []string{"10.000000"}},
+		{[]string{}, []string{}},
+		{[]string{"A"}, []string{}},
+	}
+
+	for _, test := range tests {
+		testname := fmt.Sprintf("%s", test.Input)
+		t.Run(testname, func(t *testing.T) {
+			filter := Filter{
+				Parents: []*Filter{
+					{Results: test.Input},
+				},
+			}
+			getFilterResultMax(
+				&filter,
+			)
+			if (filter.Results != nil && test.Want != nil) && !reflect.DeepEqual(test.Want, filter.Results) {
+				t.Errorf("Got %s, want %s", filter.Results, test.Want)
+			}
+		})
+	}
+}
+
+func TestFilterAverage(t *testing.T) {
+	var tests = []struct {
+		Input []string
+		Want  []string
+	}{
+		{[]string{"1"}, []string{"1.000000"}},
+		{[]string{"10000"}, []string{"10000.000000"}},
+		{[]string{"1", "2", "3", "4"}, []string{"2.500000"}},
+		{[]string{"200000", "100000", "A"}, []string{"150000.000000"}},
+		{[]string{"1", "A", "B", "2"}, []string{"1.500000"}},
+		{[]string{"3.5", "5.5", "1.75", "1.25"}, []string{"3.000000"}},
+		{[]string{}, []string{}},
+		{[]string{"A"}, []string{}},
+	}
+
+	for _, test := range tests {
+		testname := fmt.Sprintf("%s", test.Input)
+		t.Run(testname, func(t *testing.T) {
+			filter := Filter{
+				Parents: []*Filter{
+					{Results: test.Input},
+				},
+			}
+			getFilterResultAverage(
+				&filter,
+			)
+			if (filter.Results != nil && test.Want != nil) && !reflect.DeepEqual(test.Want, filter.Results) {
+				t.Errorf("Got %s, want %s", filter.Results, test.Want)
+			}
+		})
+	}
+}
+
+func TestFilterCount(t *testing.T) {
+	var tests = []struct {
+		Input []string
+		Want  []string
+	}{
+		{[]string{"1"}, []string{"1"}},
+		{[]string{"10000"}, []string{"1"}},
+		{[]string{"1", "2", "3", "4"}, []string{"4"}},
+		{[]string{"200000", "100000", "A"}, []string{"3"}},
+		{[]string{"1", "A", "B", "2"}, []string{"4"}},
+		{[]string{"3.5", "5.5", "1.75", "1.25"}, []string{"4"}},
+		{[]string{}, []string{"0"}},
+	}
+
+	for _, test := range tests {
+		testname := fmt.Sprintf("%s", test.Input)
+		t.Run(testname, func(t *testing.T) {
+			filter := Filter{
+				Parents: []*Filter{
+					{Results: test.Input},
+				},
+			}
+			getFilterResultCount(
+				&filter,
+			)
+			if (filter.Results != nil && test.Want != nil) && !reflect.DeepEqual(test.Want, filter.Results) {
+				t.Errorf("Got %s, want %s", filter.Results, test.Want)
+			}
+		})
+	}
+}
+
+func TestFilterRound(t *testing.T) {
+	var tests = []struct {
+		Input []string
+		Query string
+		Want  []string
+	}{
+		{[]string{"1.123456789"}, "0", []string{"1.000000"}},
+		{[]string{"1.123456789"}, "1", []string{"1.100000"}},
+		{[]string{"1.123456789"}, "2", []string{"1.120000"}},
+		{[]string{"1.123456789"}, "3", []string{"1.123000"}},
+		{[]string{"1.123456789"}, "4", []string{"1.123500"}},
+		{[]string{"1.123456789"}, "5", []string{"1.123460"}},
+		{[]string{"1.123456789"}, "6", []string{"1.123457"}},
+		{[]string{"1.123456789"}, "7", []string{"1.123457"}},
+		{[]string{"1.123456789"}, "8", []string{"1.123457"}},
+		{[]string{"1.123456789"}, "9", []string{"1.123457"}},
+		{[]string{"A"}, "9", []string{}},
+	}
+
+	for _, test := range tests {
+		testname := fmt.Sprintf("%s %s", test.Input, test.Query)
+		t.Run(testname, func(t *testing.T) {
+			filter := Filter{
+				Parents: []*Filter{
+					{Results: test.Input},
+				},
+				Var2: &test.Query,
+			}
+			getFilterResultRound(
+				&filter,
+			)
+			if (filter.Results != nil && test.Want != nil) && !reflect.DeepEqual(test.Want, filter.Results) {
+				t.Errorf("Got %s, want %s", filter.Results, test.Want)
+			}
+		})
+	}
+}