Can you explain the process of what coupons you used and how much were they a piece?

I’m not the poster, but I got some at Walmart when I was there Sunday! The refill’s are on sale for $1.50, and the starter kit’s for $2.00. There was a $2/1 Glade Expressions coupon in this Sunday’s SS insert. Making the refill’s free with overage of .50, and the starter kit free! The diffuser ones are also on sale, starter kit $5.00, and refill’s $2.50!