Campa Oil performs oil changes. The standard wage rate for oil change technicians is $21 per hour. By analyzing its past records of time spent on oil changes, Campa Oil has developed a standard of 21 minutes (or 0.35 hours) per oil change. In July, 1,600 oil changes were performed at Campa Oil. Oil change technicians worked a total of 295 direct labor hours at an average rate of $23 per hour. Part 1: Word Bank for Fill-in-the-Blank DL rate variance formula: Part 2: Word Bank for Fill-in-the-Blank DL efficiency variance formula: Please refrain from partially answering the question, and please also label which part of the question you are answering so that I may follow along. Thank you!