IT FRESH-837

#552 division by 0 in costprice report

Testcase to check if the bug regarding division by 0 in costprice report is fixed.

1. Run the costprice report, leave it open for comparison:
   • make sure there are no lines & qties yet for your products and TUs
2. Make sure TU A and TU B have a price set in the PLV used in costprice report (Lagerwert):
   • TU A: 5.00
   • TU B: 2.00
3. Create a purchase order for G000X:
   • P0001, 10 TU A x 1kg (set price: 1.00)
   • P0002, 5 TU B x 2 Stk (set price: 1.00)
4. Create receipts in Wareneingang POS:
   • P0001, 5 TU A
   • P0002, 2 TU B
5. Run the costprice report:
   • P0001, qty: 5kg, average price: 1.00, sum: 5.00
   • TU A, qty: 5, average price: 5.00, sum: 25.00
   • P0002, qty: 4Stk, average price: 1.00, sum: 4.00
   • TU B, qty: 2, average price: 2.00, sum: 4.00
6. Create a report for empties:
   • TU A: qty: 5
   • TU B: qty: 1
7. Run the costprice report for TU A:
   • 2 lines, qty: 5, qty: -5, average price: 5.00 for both, sum: 0.00
8. Create another purchase order for G000X:
   • P0001, 5 TU A x 1kg (set price: 0.50)
   • P0002, 2 TU B x 2 Stk (set price: 2.00)
9. Create receipts in Wareneingang POS:
   • P0001, 5 TU A
   • P0002, 2 TU B
10. Run the costprice report once more:
    • P0001, qty: 10kg, average price: 0.75, sum: 7.50
    • TU A, qty: 5, average price: 5.00, sum: 25.00
    • P0002, qty: 8Stk, average price: 1.50, sum: 12.00
    • TU B, qty: 3, average price: 2.00, sum: 6.00

Note: the original bug happened when the qties of 1 HU type was +x qty in one warehouse and -x qty in another, so you need to test with the same qty from Wareneinang (+, in warehouse for Wareneingang) and the same qty from empties report (-, in warehouse for empties)!