Cake anyone?

This week Safeway is having an AWESOME deal on Betty Crocker cake mixes, frosting, and brownie mixes. For every 2 that you buy, you get 3 free! I found coupons for $0.75 off for every cake mix AND frosting you purchase. I bought 10 cake mixes and 10 frosting. The total before the 12 free ones and 10 coupons came off was $31.80. My final total was $4.43. Or instead of paying $1.69 for the cake mixes and $1.49 for the frosting, I paid $0.22 each.