Rico earns a weekly salary of $750 and a 5% total commission on his sales. sean earns a weekly salary of $1,100 and a 2.5% commission on sales. what amount of sales will result in each of them earning the same amount for the week?

Earnings=salary+comission

rico=750+(.05)sales
sean=1100+(0.025)sales

when do them earn the same amount?
if we assume that they have the same amount of sales then
rico=sean
750+(0.05)sales=1100+(0.025)sales
(0.025)sales=350
divide both sides by 0.025
sales=14000

they have to both sell $14,000 to earn the same amount