Use the following costs to determine when mailing the catalog to all $96,551$ customers:

$$ Cost to produce and mail catalog $=$ $$0\mathrm{.}90$

$$ COGS $($cost of goods sold$)$ and variable costs $=50\%($of sales revenues$)$

a$.$ the gross profit in dollars

b$.$ the gross profit as a percent of gross sales

c$.$ the return on marketing expenditures $($gross profit$/$cost to mail catalogs$).$

marketing expenditures $($gross profit$/$cost to mail catalogs$).$

Total bought is $2371$ and avg price of $$104\mathrm{.}24$