Rhett put up nine posters in his neighborhood and handed out fliers at a local grocery store each with a photo of his lost puppy. Rhett paid $2 per poster and $0.20 per flier to print.

If x represents the number of fliers he handed out at the grocery store, which of the following equations can be used to find how much it cost Rhett to search for his lost puppy?
A. y = 18x + 0.20
B. y = 2x + 0.20
C. y = 0.20x + 2
D. y = 0.20x + 18