Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4p + 4x + 2px = 62. Suppose also that p and x are both functions of time, measured in days. Find the rate at which x is changing when x = 3, p =5, and- dp dt - =1.4. The rate at which x is changing is sale(s) per day. (Round to the nearest hundredth as needed.)