Walgreens chex mix cat deal

cat deal-
Buy 3 and get $1.50 RR
Buy 4 and get $2.50 RR
Buy 5 or more and get $3.50 RR
12/27-1/23

I bought:
5 chex mix .99ea (4.95)
- five .50 mfg
2 christmas sacks .12ea
- two $1 RR
total oop .69
got $3.50 RR
profit .81