Walgreens 5/23/12.....88% Savings

I am trying to find a good way to use up all of my $.99 Register Rewards. I found these rulers on clearance for $.25. Because I am a math teacher, I will be able to use these :)

Here is how I did this trip:

Depends $4.49
-$1.50/1 MQ
-$3.50 RR Earned
-$.51 MM!

U Kotex $3.99
-$1/1 MQ
-$3 RR Earned
-$.01 MM!

Skinny Cow Candy (2) $5.98
-(2) $1/1 MQs
-$2/2 WQ
-$1.98 or $.99 each

Sleep Sheets $4.99
-$1/1 MQ
-$5 RR Earned
-$1.01 MM!

Ruler (6) $1.50
-$1.50 or $.25 each

Subtotal: $20.95
MQ: $5.50
WQ/RR: $12.96
Tax: $1.05
OOP: $3.54
Savings: 88%