Problem $7-10($Algo$)$

Assume a fixed cost of $$900,$ a variable cost of $$5\mathrm{.}25,$ and a selling price of $$6\mathrm{.}50.$

a$.$ What is the break$-$even point? $($Roundup your answer to the next whole number.$)$

b$.$ How many units must be sold to make a profit of $$500\mathrm{.}00?($Roundup your answer to the next whole number.$)$

c$.$ How many units must be sold to average $$0\mathrm{.}25$ profit per unit? $$0\mathrm{.}50$ profit per unit? $($Roundup your answer to the next whole number. Loss should be indicated with a minus sign.$)$