i would like to ask you about sales

i would like to ask you about sales order costing

i see the sales order in march it have the overhead purchasing

but the previous month don't have it

i would like to know what is a overhead purchasing and why

ผลลัพธ์ (อังกฤษ) 2:

I would like to ask sales Order costing About You I See The sales Order it in march Have The overhead purchasing but do Not Have The Previous month it I would like to know What and Why is a overhead purchasing.