An electronics company is looking to develop a regression model to predict the number of units sold for a special running watch. Data is provided below:

Sales (units) Price ($) Advertising ($) Holiday
500 100 50 Yes
480 120 40 Yes
485 110 45 No
510 103 55 Yes
490 108 40 No
488 109 30 No
496 106 45 Yes

Compile a spreadsheet for the data and determine the predicted number of units sold if the watch is sold on a holiday for $200 while $150 is spent on advertising.

a) 424 b) 420 c) 860 d) 370