Danny and Sandy from Grease Couple's Costume

We were thinking of a good costume for Halloween and trying to keep it under $25 per person and while we were discussing ideas, the movie, Grease, came on TV, so we decided to be Danny and Sandy. I am dressed as Sandy and my friend is Danny and the costumes were inspired by the movie Grease. For Danny: black pants, black shirt, black shoes, and gelled back hair. For Sandy: black off the shoulder top, black shiny-leggings or just black leggings, black belt, red heels, and red lipstick, and curled blonde hair.