O.5x The sales decay for a product is given by S = 80,0006 , where Sis the monthly sales and x is the number of months that have passed since the end of a promotional campaign. (a) What wil be the sales 2 months after the end of the campaign? (Round your answer to two decimal places.) $: (b) How many months after the end of the campaign will sales drop below $1,000, if no new campaign is initiated? (Round up to the nearest whole number.) months