The milling corporation has developed a new type of widget. The local distributor expects to increase his sales by 20% over the past year due to this new development. Last year's sales were $600,000 at a selling price of $100 per unit. A safety stock of 23 units has eliminated stockouts. The carrying costs are $5. The manager would like to cut costs as much as possible and comes to get your advice for the economic ordering quantity. How much should he order?

A) 100 units

B) 155 units

C) 50 units

D) 490 units

Please don't copy it from Chegg or I will report. I need step by step solution.