The era of the chocolate cookie, sold from a card table for 25 cents, is rapidly fading on California school campuses. Thanks to the state's tough new nutritional standards for public schools, bake sales - that age-old staple of school fundraising - are nearly obsolete. Cookies, cupcakes, pizza and other easy-to-sell goodies invariably exceed the fat, sugar and caloric limits set by the Legislature for foods sold on campus to schoolkids. And at a time when school budgets are being slashed, some parents and school staff are mourning the loss. "Bake sales are one of the quickest and easiest ways...