After the end of an advertising campaign, the daily sales of a product fell rapidly, with daily sales given by S-3500e-0.12x dollars, where x is the number of days from the end of the campaign. a. What were daily sales when the campaign ended? b. How many days passed after the campaign ended before daily sales were below half of what they were at the end of the campaign? a. The daily sales when the campaign ended were $ (Simplify your answer. Round to the nearest cent as needed.) ***** b. How many days passed after the campaign ended before daily sales were below half of what they were at the end of the campaign? days (Round up to the nearest day.)