inventory & EBQ

Hi Sir, Please help me to solve this questions, thanks in advance :) 1) A company purchases 5000 units /quarter at even rate throughout the year. Each order placed with the supplier incurs a delivery charge of $20. The annual cost of holding one unit in inventory is $5. What is the minimum total of the inventory costs (order costs plus holding cost) per year? The answer is $2000. 2) A company manufactures a component for one of its products. it uses 6000 of these components evenly throughout the year. Each component costs $20 to manufacture. In addition there is a cost of $600 to set-up the machines each time a batch of the compenents is manufactured. The holding cost per unit $2. The company can produre the components at the rate of 5000 per month. What is the EBQ that should be manufactured each time? Answer is 2000 units. *this question i cannot get this answer, i think i put wrong figure at EOQ method.Please kindly advise & show the the calculation method. Thanks in advance :)