I need help solving this general accounting question with the proper methodology.

Reba Dixon is a fifth-grade school teacher who earned a salary of $37,080 in 2024. She is 45 years old and receives $1,200 of alimony payments each month from her former husband (divorced in 2016). Reba also rents out a small apartment building. This year Reba received $54,600 of rental payments from tenants, and she incurred $19,500 of expenses associated with the rental. Reba and her daughter Heather (20 years old at the end of the year) moved to Georgia in January of this year. Reba provides more than one-half of Heather's support. They had been living in Colorado for the past 15 years, but ever since her divorce, Reba has been wanting to move back to Georgia to be closer to her family. Luckily, last December, a teaching position opened up and Reba and Heather decided to make the move. Reba paid a moving company $2,470 to move their personal belongings, and she and Heather spent two days driving the 1,820 miles to Georgia. Reba rented a home in Georgia. Heather decided to continue…

Boston Industries completes job #842, which has a standard of 840 labor hours at a standard rate of $22.75 per hour. The job was completed in 890 hours, and the average actual labor rate was $23.10 per hour. What is the labor efficiency (quantity) variance? (A negative number indicates a favorable variance and a positive number indicates an unfavorable variance.)