The details of the invoices for merchandise purchases for XX are as follows:

Merchandise transportation terms returns and allowances total a pagar.

a.$1,000 $25 FOB shipping point,1/10,n/30. $200. = ?????

b.$5,000 ---- FOB destination, n/30 $400 = ?????

c.$4,000 $50 FOB shipping point,2/10,n?30. $150 =. ?????

d.$5,000. ------ FOB destination, 1/10,n/30. ---- =. ?????

Determine the total due to pay each invoice in full, assuming that credit for returns and allowances was received prior to payment and that all invoices were paid within the discount period. Also assume that the seller has paid transport costs in advance.