Please help ASAP

You own "Portrait Solutions", a studio where your employees take customer family pictures. According to the standards, it should take your employees 3/4 of an hour ( 45 minutes) to do pictures for one family. The standard rate of pay (to the employees) per hour is $12. Last week your employees worked 75 hours. See below for your actual rate of pay per hour. In that time, they actually completed 80 family's' pictures. A) What was the week's labor rate variance? (can round to nearest whole $ but must show "F: or "U") And show at least some calculations. B) What was the week's labor efficiency variance? (can round to nearest whole $ but must show "F: or "U") And show at least some calculations. C) (2 pts) What is a plausible cause for your labor efficiency variance? And as a manager, what would you do about it (the standards were appropriately set)