Analyze Life Force Fitness, Inc.

Life Force Fitness, Inc., assembles and sells treadmills. Activity$-$based product information for each treadmill is as follows:

$\backslash$table$[[$Activity$,\backslash$table$[[$Activity$-$Base$],[$Usage$],[($hrs$.$ per unit$)]],x,\backslash$table$[[$Activity Rate$],[$per Hour$]],\backslash$table$[[,$Activity$],[=,$Cost$]]],[$Motor assembly,$1\mathrm{.}50,,$$$20,$$$30\mathrm{.}00$