Nile Corp. has identified three cost pools to allocate overhead costs. The following estimates are provided for the coming year: Cost Pool Supervision of direct labor Machine maintenance Facility rent Total overhead costs Overhead Costs $474,000 $147,200 $243,000 $864,200 Cost driver Direct labor-hours Machine - hours Square feet of area Activity level 790,000 920,000 135,000 The accounting records show the Mossman Job consumed the following resources: Cost driver Actual level Direct labor-hours 240 Machine - hours 1,700 Square feet of area 50 If Nile Corp. uses the three activity cost pools to allocate overhead costs, what are the activity - cost driver rates for supervision of direct labor, machine maintenance, and facility rent, respectively? O A. $0.60 per dih; $0.16 per mh; $1.80 per sq ft OB. $0.60 per dlh; $0.16 per mh; $1.70 per sq ft OC. $1.67 per dlh; $6.25 per mh; $0.56 per sq ft OD. $0.50 per dlh; $0.16 per mh; $1.88 per sq ft