The following discount policy applies to concrete purchased from a vendor. write a c^++ program that will determine the total_cost (t_c) of an order placed. The unit_price (u_p) of a bag of concrete and number_of_bags (n_b) ordered should be inputted from the user into your program. You do not need to write to output files or use a loop to repeat the program. Please use the abbreviated names in parenthesis as your variable names to keep your program concise. Printout your program with a sample run of the following values: u_p = $5.50 n_b = 500. You must have your name your program as a comment and also use cout to display it with your results. Print out your program and output which will be stapled to the quiz page