Ace Manufacturing identifies the following activities and drivers for its operations: Activity Activity Driver Driver Quantity Moving Materials Number of moves 300 Machining Machine hours 10,000 Ace estimates Moving Materials and Machining will cost $2,400,000 and $4,000,000 respectively. Ace's activity rates are:

a.$800 per move and $4,000 per machine hour.

b.$80 per move and $4 per machine hour.

c.$8 per move and $40 per machine hour.

d.$8,000 per move and $400 per machine hour.