Monthly sales of a particular personal computer are expected to decline at the following rate of S'(t) computers per month, where tis time in months and S(t) is the number of computers sold each month. WIN S'(t) = -10t The company plans to stop manufacturing this computer when monthly sales reach 1,000 computers. If monthly sales now (t=0) are 1,420 computers, find S(t). How long will the company continue to manufacture this computer