Bonnie made two trips to Sweet Frog for frozen yogurt this week. She paid $0.45 per ounce each time. She purchased 7.2 ounces the first time and 6.8 ounces the second time. Rounded to the nearest cent, what is the total amount Bonnie spent at Sweet Frog this week?
Question 7 options:
$5.20
$14.00
$7.24
$6.30