Claybrooks Corporation has two manufacturing departments--Casting and Assembly. The company used the following data at the beginning of the year to calculate predetermined overhead rates: Casting Assembly Total Estimated total machine-hours (MHs) 3,000 2,000 5,000 Estimated total fixed manufacturing overhead cost $ 17,700 $ 5,800 $ 23,500 Estimated variable manufacturing overhead cost per MH $ 1.50 $ 2.20 Assume that the company uses departmental predetermined overhead rates with machine-hours as the allocation base in both departments. The departmental predetermined overhead rate in the Casting Department is closest to: $1.50 $7.40 $5.90 $6.48