Why is only value and no quantity displayed for a stock item in Stock Summary?

For some stock items only value is displayed in the stock summary report. This happens when the item has batches or godowns wherein one of the godown/batch has positive quantity and other godown/batch has a negative quantity of same number.

In such a case, the quantity gets cancelled but the value of the godown having positive quantity remains. 

For example,

A purchase was made with the following details:

     Stock item: Mobile case

     Godown: Godown 1

     Quantity: 10 nos

     Rate: Rs.100 each

     Amount: Rs.1000

A sale was made with the following details:

     Stock item: Mobile case

     Godown: Godown 2

     Quantity: 10 nos

     Rate: Rs.200 each

     Amount: Rs.2000

The Stock Summary report appears as shown below:

Solution

Make sure that the right godown is chosen on making an outward stock entry (to avoid negative stock) and all the inward entries are correctly recorded.