Alpine Production uses a standard cost system for recording transactions. Alpine reported the following data for the year ended Dec 31: Sales revenues: $600,000 Cost of goods sold (standard costing): $382, 500 Selling & Administrative expenses: $100,000 Variances: Sales revenue variance $4,200 F Direct materials cost variance 30 U Direct materials efficiency variance 300 F Direct labor cost variance 80 U Fixed overhead cost variance 420 U Fixed overhead volume variance 100 F What is the net operating income on standard cost income statement? Answer choices A. $117,230 B. $221,430 C. $117,500 D. $121,430 ***please show explanation and work for the