You can get 2 boxes of Multi-grain Cherrios and 2 boxes of various Fiber One cereals for 1.25 after coupons and eoffer.

These are on sale at Giant Eagle for 4 for $8 through next Wednesday.
Coupons.com has .75 off the multi grain and .75 off fiber one.
gianteagle.com has e-clip offers for .75 off each kind and you can use 1 per transaction.
Math

4 boxes for $8
.75 (doubled to 1.50) = 6.00 off
the .75 eclip offer = 1.25 total.