Details of Invoices for Purchases of Merchandise Are as Follows

Details of invoices for purchases of merchandise are as follows:
$\begin{array}{cccc}&&&&\underline { \text { Returns and }}\\&\underline { \text { Merchandise }}&\underline { \text { Freight }}&\underline { \text { Terms }}&\underline { \text { Allowances }} \\a&\$ 2,800 & \$ 45 & \text { FOB shipping point, 1/10, n/30 } & \$ 200 \\b&7,600 & 60 & \text { FOB destination, } \mathrm{n} / 30 & 800 \\c&1,400 & 55 & \text { FOB shipping point, 2/10, n/30 } & 600 \\d&500 & 50 & \text { FOB destination 1/10 n/30 }&0\end{array}$
Determine the amount to be paid in full settlement of each of the invoices , assuming that credit for returns and allowances was received prior to payment and that all invoices were paid within the discount period.