<span>3.60555128 is the awnser</span>
Let y be the total number of the bike that are produced
let x be the number of hours
equation:
y = 15x
3 shirts at 25.99 each : 3 * 25.99 = 77.97
plus sales tax of 5.5% : 77.97 + .055(77.97) = 77.97 + 4.29 = 82.26