Refer to Table $3\mathrm{.}2,$ which shows some costs and benefits of having your car repaired. Suppose you use your car to deliver pizzas. If you earn $$10$ per hour delivering pizzas, what is the net benefit of $3$ hours of car repairs?

$\backslash$table$[[\backslash$table$[[$Repair Time$],[($Hours$)]],\backslash$table$[[$Cost of Mechanic and Parts$],[($$$)$