Opthea sells optical equipment. Bitron manufactures special glass lenses. Opthea orders 11,400 lenses per year, 220 per week, at $40 per lens. Bitron covers all shipping costs. Opthea earns 22% on its cash investments. The purchase-order lead time is 3.0 weeks. Opthea sells 315 lenses per week. The following data are available:

Relevant ordering costs per purchase order $47.25

Relevant insurance, materials handling, breakage,

and so on, per year $5.50

What is the reorder point?

	a.	1318 lenses
	b.	660 lenses
	c.	1605 lenses
	d.	945 lense