Assigning free goods in a purchase order.

Hi,

I have to generate a report which will display the purchase order no for each condition record created in mbn1, and for each purchase order no it has to fetch the free goods assigned, eligible and remaining.

i have created a condition record for a vendor, with the following particulars,

if the vendor e.g ven1 purchases material e.g mat1

min qty = 100

free goods qty = 10

add. free goods = 2

calculation method is prorated

and the type is Inclusive.

But when i try to create a purchase order for that vendor ven1 for 200 qty of mat1, the gross price being calculated is for 200 qty, but it should be calculated for the quantity excluding the free goods qty.

What might be the reason, do i have to do any configuration in SPRO, if so guide me with the steps or can you help me in solving this problem