diff --git a/pages/formate.wxs b/pages/formate.wxs
index 38520df..117d58e 100644
--- a/pages/formate.wxs
+++ b/pages/formate.wxs
@@ -63,6 +63,9 @@ function formatePrice(value, kg) {
     return '- -'
   }
   if (value || value !== 0) {
+    if(value < 0){
+      value = -value
+    }
     if(kg){
       return (parseFloat(value)).toFixed(3)
     } else {