hi,

Its in the column BL for the Start_Makeup and column BM for the End_Makeup.

if you try to edit it you will see its fetching the dates from the planner where the first quantity is place and the last quantity for the end date together with the calender from the row CK10 to IC10.

If you see row 13 you will see it fetch the start date as 07/08 as it start here with 20 pcs and the end date as 11/08 as it complete the quantity here with 3 pcs.

I hope this helps.