An accounting firm has ordered $57$ new computers at a cost of $$1646$ each. The machines will not be delivered for $6$ months. What amount could the firm deposit today in an account paying $4\mathrm{.}23\%$ simple interest to have enough money to pay for the machines in $6$ months?

The present value $PV$ of a future amount of FV dollars at a simple interest rate $r$ for $t$ years is given by which formula?