Data were collected on monthly sales revenues (in $1000s) and monthly advertising expenditures ($100s) for a sample of drug stores. The regression line relating revenues (Y) to advertising expenditure (X) is estimated to be y = - 48.3 + 9.00x. What is the predicted sales revenue for a month in which $1,000 was spent on advertising? . . . . . O A. $90,000 O B. $8,951.70 CC. $41,700 O D. $851.70