9514 1404 393
Answer:
$120
Step-by-step explanation:
Let c represent the original price of the calculator. Then the amount Justin spent was ...
(6.20 +c)(1 -0.15) = 107.27
6.20 +c = 107.27/0.85 . . . . . divide by the multiplier on the left
c = 126.20 -6.20 . . . . . . . . . . subtract 6.20
c = 120
The original price of the calculator was $120.
