and shipping cost amounts to $$90$ per headset.

$($a$)$ What is the greatest profit your company can make in a week? $($Give your answer to the nearest whole number.$)$

$

How many headsets will your company sell at this level of profit? $($Give your answer to the nearest whole number.$)$

$q=$ headsets

$($b$)$ How much; to the nearest $$1,$ should your company charge per headset for the maximum profit?

$p=$$