Regression Analysis Was Applied Between Sales (In $1000s) and Advertising $\hat { y }$

Multiple Choice

Regression analysis was applied between sales (in $1000s) and advertising (in $100s) , and the following regression function was obtained. ? $\hat { y }$ = 500 + 4x
?
Based on the above estimated regression line, if advertising is $10,000, then the point estimate for sales (in dollars) is _____.

A) $900
B) $900,000
C) $40,500
D) $505,000