# The Real Cost When you save to make a big purchase, be sure to consider the sales tax you will have to pay. Have you ever paid sales tax?

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The Real Cost When you save to make a big purchase, be sure to consider the sales tax you will have to pay. Have you ever paid sales tax?

Lesson Objective Find the best buy based on unit price. Content Vocabulary comparison shopping comparison pricing Comparing prices to find the best value.

Oatmeal is sold in three sizes. The price of an 18-ounce package is \$1.86. The price of a 42-ounce package is \$3.17. The price of a 112-ounce package is \$6.29. Based on price alone, which package is the best buy? Example 1

Find the unit price for each item. Price per Item ÷ Measure or Count 18-ounce package: \$1.86 ÷ 18 = \$0.10333 \$0.10333 × 100 = 10.33¢ per ounce Example 1 Answer: Step 1

42-ounce package: \$3.17 ÷ 42 = \$0.07547 \$0.07547 × 100 = 7.55¢ per ounce 112-ounce package: \$6.29 ÷ 112 = \$0.05616 \$0.05616 × 100 = 5.62¢ per ounce Example 1 Answer: Step 1 (cont.)

Find the best buy. Compare: 10.33¢, 7.55¢, and 5.62¢ per ounce The 112 ounce package at 5.62¢ per ounce is the best buy. Example 1 Answer: Step 2

Bounce fabric softener sheets are sold in an 80-count box for \$3.17, a 120-count box for \$4.44, and a 160-count box for \$6.24. What is the unit price for each? Which is the best buy? Practice 1

\$3.17 ÷ 80 = \$0.039625 = 3.96¢ per sheet \$4.44 ÷ 120 = \$0.037 = 3.7¢ per sheet \$6.24 ÷ 160 = \$0.039 = 3.9¢ per sheet The 120-count size is the best buy. Practice 1 Answer

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