Q1) Why I can't conclude that good cost control has kept overall variable manufacturing cost performance below master budget targets without conducting further analyses?
Actual Performance | Master Budget
Sales revenue 840,000 | 1,000,000
Variable manuf. costs 329,680 | 380,000
Variable selling and admin costs 68,000 | 90,000
Fixed manuf overhead 195,500 | 200,000
Fixed selling and admin costs 132,320 | 140,000