4 Demand for phones at Amazon is 5,000 per monL Holding cost is 20 peroent and the company incurs a fixed cost of $500 for each order placed. The supplier offers an all unit quantity discount with a price of $200 per phone for O to 10,000 phones in an order, a price of $190 for 10,000 20,000 phones and a price of $1.30 for above 31000. 4!. l2 poinisl Calculate Clo, 0.] and Q! where the slope of the total costs E I]. Ch: 21095.45 | C1; =1109_4D Q: = 1123.90 4.2. [2 point) What are the three candidates (19', CL" and (11* for the optimal order quantity (1*? 02': or: 4.3. (2 points) Calculate the total costs at On*, Q.* and 0,*. TCO = TO1 = TC = 4.4. (2 point) What are the optimal order quantity Q* and the minimum total cost