Answer:
$63 should be the refund amount
Step-by-step explanation:
Given that Brenda was charged $94.50 for a 3 hour cleaning session, but wants to apply a 2 hour voucher, so we are asked to determine what her refund amount should be.
Total Cost: $94.50 for 3 hours
94.50/3 = 31.5
$31.50 per hour
2 hour voucher = 2 x 31.50
= $63
$94.50 - 63 = 31.50
so Brenda ends up only having to pay for 1 hour which is $31.50 and thus should be refunded $63