Current Attempt in Progr Information for Martinez Gruber, Inc. for the current and prior months is provided below: Cost Activity in Cost Item Units Rent Current Month 21800 $49100 Expense Prior Month 10900 49100 Factory Current Month 21800 79100 Labor Prior Month 10900 39550 How would the costs for "Rent Expense" and "Factory Labor" be classified? O Rent Expense is a variable cost and Factory Labor is a fixed cost. O Rent Expense is a fixed cost and Factory Labor is a variable cost. O Both Rent Expense and Factory Labor are variable costs. Both Rent Expense and Factory Labor are fixed costs