A job cost estimates include 630 productive labour hours. In, addition, it is anticipated that idle time will be 10% of the total hours paid for the job. The wage rate is $12 per hour. What is the total estimated labour cost? (a) $6,804 (b) $7,560 (c) $8,316 (d) $8,400 Correct answer is $8,400 But my answer is option a and option c
If 630 productive hours are needed, this is after the idle hours.
If 10% of hours paid for are idle, 630 represents the remaining 90% productive hours. 100% of the hours is therefore 630/0.9 = 700. [Check: 90% of 700 = 630].