Solve the Problem $\$ 210$ Plus Commission Of $14 \%$ Of Sales Company B Offers a Weekly Salary Of Offers

Multiple Choice

Solve the problem.
-A salesperson has two job offers. Company A offers a weekly salary of $\$ 210$ plus commission of $14 \%$ of sales. Company B offers a weekly salary of $\$ 420$ plus commission of $7 \%$ of sales. What is the amount of sales above which Company A's offer is the better of the two?

A) $\$ 3100$
B) $\$ 1500$
C) $\$ 3000$
D) $\$ 6000$