[geon]

> Particularly when you consider the cost of the labor, the extra cost of the wool is nothing.

> she did sell a wool sweater to somebody who went home and washed in hot, it shrank, and then heard no ends of complaints about it

If she still can sell all the sweaters she knit, her customers clearly don't care about the material. Using a matrial that doesn't shrink increases the percieved quality of her product and gives her less trouble.

Seems reasonable to me.