Giant PA: How to keep a Catalilna rollin'

I went to Giant to take advantage of the FREE Combos.  I bought a total of 12 Combos in 2 transactions and only spent $3 oop (out of pocket) and here's what I did:

Transaction #1

 6 - Combos on sale 10/$10

• used 3 - $1/2 any Combos (5/22 RP)
• earn $1 Catalina for every 2 you buy

Total $3 oop plus earned 3-$1 Catalinas to use on my next purchase

Transaction #2

 6 - Combos on sale 10/$10

• used 3 - $1/2 any Combos (5/22 RP)
• earn $1 Catalina for every 2 you buy
  

Used 3-$1 Catalina from Transaction #1
Total $0 plus earned 3-$1 Catalinas to use on my next purchase!