Question 4' (I5 paints) During the past months, a retailer shipped orders at a rate of : a (I) = 3,200+ 25: packages per month 0 S r 5 10; r being the time in months since the beginning of the year. During the same period, the cost of shipping a package averaged approximately : p (I) = 4e'M' S a\" package 0 5:310 Use an integral to estimate, to the nearest thousand dollars, the total.I spent on shipping orders during the last tenmonth period