Peaches are being sold for $2 per pound. The customer created a model to represent the total cost of peaches bought. If x represents the number of pounds of peaches bought and y represents the total cost of the peaches, which best describes the values of x and y? O The values of both x and y can be any real number. O The values of both x and y will be real numbers greater than or equal to 0. O The value of x and y will always be zero O The value of x can be any real number greater than or equal to 0, but the value of y must be an integer greater than or equal to 0.