A seller is considering extending trade credit to an existing customer that buys on cash terms. The

customer has just placed a sales order $($cash terms$)$ for immediate delivery of $100$ units at a sales price

per unit of $$50.$ The customer states that they will increase their sales order by $5$ percent if they receive

a $30-$day credit period. Variable costs are $$45$ per unit and involve an immediate cash outflow. If the

seller has an annual opportunity cost rate of $7\mathrm{.}3$ percent, what is the NPV of extending credit to the

customer?