Alex bought 4 protein bars and 2 apples for $11. Mel bought 2 protein bars and 4 apples for $7. Find the cost of a single protein bar and a single apple.

So don't take my word i'm not exactly a mathematical person but i would assume a. because while selling the soap every month you increase in sells so you would by 11 percent. the you would get the factor 0.89 which if i had to guess would be the monthly profit over 11 probably wrong tho