Solve it quickly within 15 minutes . Please do it asap . I will give two upvotes immediately.

Which of the following formulae is the correct formula to measure the efficiency variance? Select one: O Efficiency Variance = (Actual Quantity - Standard Quantity) * Actual Cost Efficiency Variance = (Actual Quantity + Standard Quantity) - Standard Cost O Efficiency Variance = (Actual Quantity - Standard Quantity) * Standard Cost O Efficiency Variance = (Actual Quantity - Standard Quantity) * Actual Cost O Efficiency Variance = (Actual Quantity - Standard Quantity) - Standard Cost