In each of the following formulas, supply the words that should be inserted for each number in parentheses.
(a) (Actual quantity × (1)) − (Standard quantity × (2)) =
Total materials variance
(b) ((3) × Actual price) − (Actual quantity × (4)) =
Materials price variance
(c) (Actual quantity × (5)) − ((6) × Standard price) =
Materials quantity variance