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Blaster, Inc., a manufacturer of portable radios, purchases the components from subcontractors to use to assemble into a complete radio. Each radio requires three units each of Part XBEZ52, which has a standard cost of $1.45 per unit. During May, Blaster experienced the following with respect to Part XBEZ52:
Purchases ($18,000) ...12,000 Units
Consumed in manufacturing ...10,000 Units
Radios manufactured... 3,000 Units
During May, Blaster incurred a materials efficiency variance of