Buy a solar oven! I've searched to find the most cost effective way of cooking for single moms (and everyone else!). These are a good price & work really well! Email me for a flyer. I sell the SOS Sport & Global Sun solar ovens. Prices include shipping to your door. https://sites.google.com/site/singlemompreparedness/solar-ovens.
Click on photo below to go to info/order page.
Here's what I got at Walgreens this week. The toothpaste & shampoo were free after coupons & register rewards. I paid $9 for the U by Kotex (after coupons) & got back $10 in movie cash. (you may want to check that there's a theater near you on the movie cash before buying http://emoviecash.com/locator/)
Check a blog such as moneysavingmom.com to get details on where to get the coupons.