Tanya owns a small business.

1. (a)Tanya has 4 employees. Every week, the employees each work for 7 3/4 hours each day for 5 days. Each employee is paid $15.20 per hour. Calculate the total amount Tanya pays her 4 employees in one week.[2]
2. (b)The business made a profit of $25 700 in 2017 compared with $22 102 in 2018. Calculate the percentage decrease in profit from 2017 to 2018.[2]
3. (c)Tanya must add 8% sales tax to the initial cost of a job. She then adds 15% to the cost, including sales tax, to find the amount to charge a client. Tanya charges one client a total of $465.75 for a job. Calculate the initial cost of this job.[3]
4. (d)Tanya invests $8500 in an account paying 3.1% per year compound interest. At the end of 5 years she takes $9300 from the account to buy new equipment for the business. Calculate how much money is left in the account after buying the new equipment.[3]