VAT Implementation in RMS Version 12

Hi ,

We are trying to implement VAT in RMS version 12 in UAE. I have below 2 questions-

1)At the time of PO receipt, want to know if RMS version 12 receiving API allows us to post tran code 87 to account VAT cost on receipts exclusively?

2)If existing receiving  API in version 12  allows to post tran code 87, then Tran Code 20 cost is VAT inclusive , or will it be exclusive of VAT?

3)If Tran Code 20 cost is VAT inclusive, will it (VAT cost component of TC 20)  affect WAC(Average Cost) in item_loc_SOH at the time of receipts?

Thanks,