Using the output below, predict the amount of monthly sales if monthly advertising expenses is $1,173. SUMMARY OUTPUT Regression Statistics Multiple R 0.9880 R Square 0.9762 Adjusted R Square 0.9738 Standard Error 868.4866 Observations 12 Coefficients Standard Error P-Value Intercept 759.57 2.991435587 2217390932 Monthly Advertising Expenses 1.91 0.482113498 0000000019 O $890,978 $3,000 O.-$3,000 -$890,978

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