A Company produces two products- calculators and games. The company planned to produce 4,000 calculators and 8,000 games. The company uses ABC costing, and one of the activity cost pools was assembly, which had an output measure of total parts. The total estimated overhead for the assembly cost pool was $660000. The calculator required 16 parts, and the games required 52 parts.

What is the activity rate for the assembly activity?