$1.$ Complete cells $($A$)$ to $($J$)$ in the table below.

$2.$ What is the breakeven rate?

$3.$ Which group should the marketer include in the marketing campaign?

$4.$ If you reach out to only the group you selected in Q$3,$ what is the gross profit in dollars of

this marketing campaign?

$5.$ If you reach out to only the group you selected in Q$3,$ what is the return on marketing

expenditures $($gross profit as a function of marketing costs$)?$

$6.$ What is the breakeven index of group B$?$