I think it was called something like Socks For Supper, and was about a very poor old couple, who have no money to buy food. So the wife takes a sweater of the husband's, and she undoes enough of it to knit a pair of socks, and sells them to the neighbors for a cheese. When they're done with that one, she does so again, and again, until the sweater is all used up, and there's only enough yarn to make one sock. So she makes the one sock and goes to see if the neighbors will buy it anyways- they do, and the neighbor's wife exclaims that it's just perfect- it's just the amount of yarn that she needs to finish the sweater that she's been making from the socks.