Low Cost Ear Instruments My Little Dachshund Has What Appears To Be Ringworm On Her Ear, Anyone Have Any Suggestions For A Cure?

My little Dachshund has what appears to be Ringworm on her ear, anyone have any suggestions for a cure? - low cost ear instruments

Currently, there is a circle on the lookout for something in his ear about the size of a cent, and the skin is a little bit the look of the film in the region.

Can anyone recommend a cost effective solution, as I am with very limited income and trying to help my dog.