20. A bookstore has 100 dictionaries, 70 cookbooks, and 90 thesauruses in stock, and a second store with 85 dictionaries, 95 cookbooks, and 60 thesauruses in stock. If the value of each dictionary is $28, each cookbook is $22 and each thesaurus is $16, use the matrix operations on a graphing calculator to find the total value of the bookstore"s inventory. | |
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