dealer invoice

Hi all,

My problem is i am doing one dealer procurement wherein i know the excise values in invoice only.My senario is like this

Base price 1000 rs

BED 300

AED 200

Ecess 75

Secess 37

total price 1612rs

packing costs 200

cst 3% on price+packing costs 54.36

total price 1666.36

I am doing this through MRP indicator in MIGO

My doubt is as per SAP standard the po price should be base price + excise duties. Here i have to take packing costs also for cst consideration. Whether i have to include these packing costs also or not. And what tax code i have to take whether i have to take zero tax code or any other tax code

can anyone please guide me in this scenario

regards

manu