Princeton precious stone Company reported the following budgeted and actual results based on sales of 100 units of product: Flexible Budget "As if" Budget Actual Results Direct labor $800 $750 $850 Direct materials $520 $450 $450 Overhead $700 $700 $710 The company's total input quantity variance is: a) $70 favorable. b) $160 unfavorable. c) $100 favorable. d) $120 favorable