Millner Corporation has provided the following data from its activity-based costing accounting system: Activity Cost Pools Total Cost Total Activity Designing product design products. $1,372,448 7.798 hours Setting up batches. $33,300 740 batch set-ups Assembling products.... $126,160 6,640 assembly hours The activity rate for the designing products activity cost pool is closest to: 1.$101 per product design hour 2. $1,372,448 per product design hour 3.$176 per product design hour 4.$57 per product design hour