You need to account for your JAC incentive. Top step fire captain needs to subtract 150 for education incentive, then do the formula from the TA, then add the 150 on top to figure out the true OT rate.
6556 - 150 = 6406
6406 / 53 = 120.87
120.87 x 1.5 = 181.30
181.30 x 6 = 1087.81
1087.81 + 6406 = 7493.81 (round to the nearest whole number)
7494 + 150 = 7644 (66 hour salary)
7644/4.33/53x1.5 = 49.96 new OT hourly rate