Save $20 WUS $75 or more question

I received a coupon in the mail, 20x the points WUS 50 or more. Tomorrow only, there is a coupon of save 20 WUS 75. Do you think i could combine them? I mean after the 20 is taken off i'm still over 50.00 to use the 20x coupon. I've done something similiar when they had the movie ticket promo a few months ago and it worked. I'm thinking it will work. Also does anyone know if after you save the 20.00 what is your base points? Is it based on 75 or the amount after the 20.00 coupon is used? I hope i'm not sounding confusing..Lol... Thanks

Do any of the coupons say something like "this coupon may not be combined with any other offers"? If so, then the cashier will probably take only one.

If it doesn't, then you can try to charm your way with them into taking it ;)