Caitlin Grasso is a salesperson in the kitchen and bath department at Morris Supplies, Inc. She is guaranteed a minimum
salary of $200 per week plus 5.5% of her total sales. What are her total
sales for a week in which her gross pay was $560?

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?