10. Thirty pounds of potatoes cost $8.10. Find the unit cost. Find the most economical purchase: 25 feet for $29.75, 30 feet for $36.30, 40 feet for $46.00, or 50 feet for $58.50. Photocopying costs $.07 per page. Find the total cost of photocopying 400 pages. The average price of gasoline rose from $1.20 to $1.26 in 2 months. What was the percent increase in the price of gasoline? Bionex stock that sold for $42.00 per share increased in price by 1.5% in a day. What is the new price of the stock? A summer resort employs 800 people during the summer season. At the end of the summer season, the resort reduces the number of employees by 80%. What is the decrease in the number of employees? Ajacket that regularly sells for $140 is on sale for 15% off the regular price. What is the discount? A credit card company charges a customer 1.25% per month on the customer's unpaid balance. Find the interest owed to the credit card company when the customer's unpaid balance for the month is $4200. A money market fund pays 8% annual interest compounded monthly. What is the value of $10,000 after 20 years in this money market fund? Use the Compound Interest Table. A computer operator's hourly wage is $12.60. For working the evening shift, the operator's wage is increased by 15%. What is the computer operator's hourly wage for working the evening shift