1 The John Equipment Company estimates its carrying cost at 15% and its ordering cost at $90 per order. The estimated annual requirement is 78,000 units at a price of $4 per unit. Required: 1. What is the most economical number of units to order? 2. How many orders should be placed in a year? 3. How often should an order be placed? Problem 2 To date, Raymond Bro. has been purchasing an item in lots of 900 units. This equates to a three-month supply. The cost per unit is $12, the order cost is $16 per order, and the carrying cost is 25%. Required: How much can Raymond Bro. save per year by purchasing the item in the most economical quantities? Problem 3 A manufacturing company places a semi-annual order of 24,000 units at a price of $20 per unit. Its carrying cost is 15% and the order cost is $12 per order. Required: 1. What is the most economical order quantity? 2. How many orders need to be placed