retail - sizes


	check average time to sale from arriving in the store for

	each size.


	e.g.


		weeks

	S	16
	M	12
	L	4
	XL	5




put more sizes in each batch if sold quickly, less

	of the less-popular sizes



number in batch (S) = (16+12+4+5) / 16

		    = 2



number in batch (XL) = (16+12+4+5) / 5

		     = 7


	