${?}^{\frac{4x}{9}}+{?}^{\frac{5y}{8}}=\frac{5}{36}$

A company that makes optical computer input

devices has calculated their revenue and costs as

follows for the most recent fiscal period:

Sales $$522000$

Costs:

What is the break$-$even point in sales dollars?

A$)$ $$362500\mathrm{.}00$

B$)$ $$589666\mathrm{.}67$

C$)$ $$241666\mathrm{.}67$

D$)$ $$870000\mathrm{.}00$

E$)$ $$280333\mathrm{.}33$

Shahnaz Ltd$.$ received an invoice dated

November $20$ from Wallis Specialties of Germany

with terms $5/20,\frac{n}{45}$ for:

$10$ vases at $$35\mathrm{.}00$ each;

$20$ figurines at $$50\mathrm{.}50$ each;

$40$ glass flutes at $$80\mathrm{.}50$ each.

All items are subject to trade discounts of $30\%,10\%,$

$5\%.$

a$)$ What is the last day of the discount period?

b$)$ What is the amount due if the invoice is paid in full

on December $8?$

c$)$ If only a partial payment is made on the last day of

the discount period, what amount is due to reduce the

outstanding balance to $$1500\mathrm{.}00?$