I did the same. 10 cans and the extra .40 came off each can.
It never hurts to ask for a substitution, since in this case a rc would not work. The Planters coupon was also good for the Nabisco 100 calorie bars. So the mgr at my store was very pleased to offer them instead. It was not on sale - I bought 3, and they rung up at 3.29 I believe, but he price adjusted to 2.99 (price of the other ones) and then took the 3.00 off.
It made me happy...
![]()