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Fast Track Auto produces and sells an auto part for $85 per unit. In 2020,120,000 parts were produced and 75,000 units were sold Other information for the year includes: Direct materials $25 per unit Direct mamufacturing labor 56 per unit Variable manulacturing costs $1 per unit Sales commistions 58 per part Fixed mamulacturing costs $800,000 per year Adminictrative expensess, all fixed 5310,000 per year What is the inventoriable cost per unit using yariable costing? A. 525 1. 531 C. 540 D. 532