Yeah I could have earned an additional 200 AM by breaking up the shopping into 3 trips (the cashiers/managers all refuse to scan the $100/100 coupon multiple times and override it)... but it is hard to write up a list of items for $100 when you are distracted by the realization of needing school snacks for the picky eater, surprise blue AM tags in the aisle, and a sense of haste, as the other moms start filling carts with granola bars, LOL
The reason I go in and out of the store and do these on separate transactions is because once, I had everything all arranged in the cart and on the belt, but then the ONLY cashier on duty started scanning it all together (before I put my re-usable bags at the end, so she was bagging in plastic, ARGH!)
and there was a line forming behind me so I didn't want to be THAT customer that angered customers, the manager and the cashier... because I know I have to shop there a lot!

A
nd the other time I tried to get it all in my cart and break up the transactions, the manager got all huffy and told me, "you can only do the AirMiles promo ONCE! A! DAY! you Airmiles people, you're worse than couponers!" and I wasn't about to start an argument, so now... I actually do the shopping in separate transactions.
next time I swear I will do all my math first and color-code the shopping list so I know what to buy, in what order. gotta be organized and NOT get distracted!