Mathematics, 23.10.2020 22:10 oomale

In 1990 first-class mail cost $0.25 for the first ounce or fraction, and $0.20 for each additional ounce or fraction. Annette sent two letters. One weighed 3 ounces. The other weighed 5 1/2 ounces. What was the total cost?

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In 1990 first-class mail cost $0.25 for the first ounce or fraction, and $0.20 for each additional o...

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