After a brief calculation I'm forced to conclude that even without factoring the time cost, it's cheaper for me to buy cookies than to make my own. Therefore unless I've a hankering for the types of baked goods (such as the strawberry-white-chocolate-oat-meal cookies I've mentioned before) that are usually not in store (or corn bread -- corn bread, biscuits, and banana bread are pretty cheap to make) I should just buy the darn things.