The selling price per box for Cynthia's Cookies is $$19\mathrm{.}95.$ Fixed costs are $$60,000$ and the variable cost per box is $$9\mathrm{.}56.$

a$.$ What is the break$-$even quantity? Round your answer to the nearest whole number. boxes

b$.$ If sales last year were $8,100$ boxes, what was the net profit? Round your answer to the nearest dollar.