Details of Purchase Invoices Including Shipping Terms, Credit Terms, and Returns

Details of purchase invoices including shipping terms, credit terms, and returns appear below. Compute the total amount to be paid in full settlement of each invoice, assuming that credit for returns is granted before the expiration of the discount period and payment is made within the discount period. $\begin{array} { | l | l | c | c | } \hline \text { Invoice } & \text { Freight and Credit Terms } & \begin{array} { c } \text { Transportation } \\\text { Charges }\end{array} & \begin{array} { c } \text { Returns and } \\\text { Allowances }\end{array} \\\hline \text { a) } \$ 2,000 & \text { FOB destination, } 3 / 10 \mathrm { n } / 45 & \$ 55 & \$ 200 \\\hline & \text { FOB shipping point, } 2 / 10 & & \\\text { b) } \$ 5,500 & \mathrm { n } / 30 & \$ 100 & \$ 50 \\\hline & \text { FOB shipping point, } 2 / 10 & & \\\text { c) } \$ 6,700 & \mathrm { n } / 45 & \$ 200 & \$ 350 \\\hline \text { d) } \$ 9,300 & \text { FOB destination, } 2 / 10 \mathrm { n } / 60 & \$ 150 & \$ 550 \\\hline\end{array}$