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 30 units at a sales price per unit of $10. The customer states that they will increase their sales order by 20% if they receive a 90-day credit period. Variable costs are $3 per unit and involve an immediate cash outflow. If the seller has an annual opportunity cost rate of 7.3%, what is the NPV of extending credit to the customer?

Select one: a. -$35.63

b. $35.63

c. $210.00

d. $245.63