Hi I need help with Single Plantwide Factory Overhead Rate:

Total Costs = 56,160

There are tortilla chips , potato chips, pretzels, the

budgeted volume (cases) are :

tortilla 4,200

potato chips 2,700

Pretzels 4,200

The processing hours per case :

tortilla chips 0.12

potato chips 0.10

pretzels 0.15

I do not know which numbers need to be calculated to find the "per processing hour"