Find AW$,$ FW$,$ and PW$->6-4.$ Three mutually exclusive design alternatives are

being considered. The estimated sales and cost data for

each alternative are given on p$.292.$ The MARR is $20\%$

per year. Annual revenues are based on the number

of units sold and the selling price. Annual expenses

are based on fixed and variable costs. Determine

which selection is preferable based on AW$.$ State your

assumptions. $(6\mathrm{.}4)$