Vision Company sells optical equipment. Blitz Company manufactures special glass lenses. Vision orders 11,400 lenses per year. 220 per week, at $14 per lens. Blitz covers all shipping costs. Vision earns 21% on its cash investments. The purchase order lead time is 2.0 weeks. Vision sells 305 lenses per week. The following data are available: $47.25 Relevant ordering costs per purchase order Relevant insurance, materials handling, breakage, and so on, per year $5.50 What is the economic order quantity for Vision? 443 lenses 341 lenses 270 lenses 191 lenses