The Go-Fast Car Company (GFCC) has a large excess inventory of two paints colors (G1 and G2). The first (G1) has 11% blue paint and 89% green paint. (G2) has 22% blue paint and 78% green paint. Marketing has found that customers are satisified with 18% blue paint in the mixture. If the cost of G1 is $7.50/gallon and G2 is $13.50/gallon. What % og G1 must be mixed with G2 to satisfy customers? What is resulting paint cost per gallon?