Here is a great scenario to get the Magnum Double Caramel Ice Cream Bar for just $0.89 at Walgreens:

Buy 1 Magnum Double Caramel Ice Cream Bar $2.39, Regular Price
Use $1.00/1 Magnum Ice Cream Bar coupon from RP 7/31
And use $0.50/1 Walgreens Coupon from August Coupon Booklet

Final Price: $0.89