diff --git a/pkg/datasource/response_handler.go b/pkg/datasource/response_handler.go
index d8fcfaa..06f96f9 100644
--- a/pkg/datasource/response_handler.go
+++ b/pkg/datasource/response_handler.go
@@ -157,17 +157,9 @@ func convertHistoryToDataFrame(history zabbix.History, items []*zabbix.Item) *da
 func convertTrendToHistory(trend zabbix.Trend, valueType string) (zabbix.History, error) {
 	history := make([]zabbix.HistoryPoint, 0)
 	for _, point := range trend {
-		valueStr := point.ValueAvg
-		switch valueType {
-		case "min":
-			valueStr = point.ValueMin
-		case "max":
-			valueStr = point.ValueMax
-		}
-
-		value, err := strconv.ParseFloat(valueStr, 64)
+		value, err := getTrendPointValue(point, valueType)
 		if err != nil {
-			return nil, fmt.Errorf("error parsing trend value: %s", err)
+			return nil, err
 		}
 
 		history = append(history, zabbix.HistoryPoint{
@@ -179,3 +171,41 @@ func convertTrendToHistory(trend zabbix.Trend, valueType string) (zabbix.History
 
 	return history, nil
 }
+
+func getTrendPointValue(point zabbix.TrendPoint, valueType string) (float64, error) {
+	if valueType == "avg" || valueType == "min" || valueType == "max" || valueType == "count" {
+		valueStr := point.ValueAvg
+		switch valueType {
+		case "min":
+			valueStr = point.ValueMin
+		case "max":
+			valueStr = point.ValueMax
+		case "count":
+			valueStr = point.Num
+		}
+
+		value, err := strconv.ParseFloat(valueStr, 64)
+		if err != nil {
+			return 0, fmt.Errorf("error parsing trend value: %s", err)
+		}
+		return value, nil
+	} else if valueType == "sum" {
+		avgStr := point.ValueAvg
+		avg, err := strconv.ParseFloat(avgStr, 64)
+		if err != nil {
+			return 0, fmt.Errorf("error parsing trend value: %s", err)
+		}
+		countStr := point.Num
+		count, err := strconv.ParseFloat(countStr, 64)
+		if err != nil {
+			return 0, fmt.Errorf("error parsing trend value: %s", err)
+		}
+		if count > 0 {
+			return avg * count, nil
+		} else {
+			return 0, nil
+		}
+	}
+
+	return 0, fmt.Errorf("failed to get trend value, unknown value type: %s", valueType)
+}
diff --git a/pkg/datasource/zabbix.go b/pkg/datasource/zabbix.go
index 68f4e8b..c189c05 100644
--- a/pkg/datasource/zabbix.go
+++ b/pkg/datasource/zabbix.go
@@ -61,11 +61,11 @@ func (ds *ZabbixDatasourceInstance) queryNumericItems(ctx context.Context, query
 }
 
 func (ds *ZabbixDatasourceInstance) queryNumericDataForItems(ctx context.Context, query *QueryModel, items []*zabbix.Item) ([]*data.Frame, error) {
-	valueType := ds.getTrendValueType(query)
+	trendValueType := ds.getTrendValueType(query)
 	consolidateBy := ds.getConsolidateBy(query)
 
-	if consolidateBy == "" {
-		consolidateBy = valueType
+	if consolidateBy != "" {
+		trendValueType = consolidateBy
 	}
 
 	err := applyFunctionsPre(query, items)
@@ -73,7 +73,7 @@ func (ds *ZabbixDatasourceInstance) queryNumericDataForItems(ctx context.Context
 		return nil, err
 	}
 
-	history, err := ds.getHistotyOrTrend(ctx, query, items, consolidateBy)
+	history, err := ds.getHistotyOrTrend(ctx, query, items, trendValueType)
 	if err != nil {
 		return nil, err
 	}