A company is interested in estimating sales for its 200 stores. To do this, the company collects information on 1990 and 1991 sales from a simple random sample of 12 stores. The results of this sampling study are given in the table.

Suppose 1990 sales were $27 million. Use the ratio method to estimate the sales for 1991.

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Store 1 2 23 3 4 5 6 7 8 9 10 11 12 1990 sales $155,600 89,540 275,400 180,900 325,000 222,200 250,400 151,000 190,600 99,900 311,000 272,500 1991 sales $160,200 98,900 282,000 190,200 320,500 199,900 278,400 178,000 240,000 115,100 354,000 295,000