A large grocery store chain pays all workers time and a half on Saturdays and double time on Sundays. If an employee's regular pay is $10.50 per hour, use the expression 10.50(1.5)(x) + 10.50(2)(y) to find their gross income if they worked 5 hours on Saturday and 3.5 hours on Sunday. (4 points)
$160.13
$152.25
$312.38
$143.31