A$.$ Your biotech firm plans to buy a new DNA sequencer for $$500,000.$ The seller requires that you pay $20\%$ of the purchase price as a down payment and is willing to finance the remainder by offering a $48-$month loan with equal monthly payments and an interest rate of $0\mathrm{.}5\%$ per month. What is the monthly loan payment?

B$.$ Consider three $10-$year bonds with semi$-$annual coupon payments. One bond has a $10\%$ coupon rate, one has a $5\%$ coupon rate, and one has a $3\%$ coupon rate. If the yield to maturity of each bond is $5\%,$ what is the price of each bond per $$100$ face value? Which bond trades at a premium, which trades at a discount, and which trades at par?

C$.$ You own a car dealership and are trying to decide how to configure the showroom floor. The floor has $2000$ square feet of usable space. You have hired an analyst and asked her to estimate the NPV of putting a particular model on the floor and how much space each model requires: