Harmons sells an average of 40 tubes of chapstick weekly. The normal price paid by Harmons is $1 per tube it costs Harmons $25 to place an order, and Harmons' annual holding cost rate is 20%. Answer the following questions: 1. How many tubes of chapstick should be ordered to minimize combined ordering and holding cost? 2 The supplier is willing to offer a 8% minimize combined ordering, holding and purchasing cost? discount on orders of at least 800 tubes. How many tubes of chapstick should be order to minimize combined odering, holding and purchasing