The predetermined overhead rate can be obtained by calculating the total cost (variable cost + fixed cost) then dividing it to the amount of work hours. This is calculated based on the estimated machine hours.
Total cost = $7.03 * 62,000 + $1,486,140
Total cost = $1,922,000
The predetermined overhead rate is therefore:
Predetermined overhead rate = $1,922,000 / 62,000 hours
Predetermined overhead rate = $31 / hr