An airline describes airfare as follows. A normal ticket's base cost is $$300.$ Persons aged $60$ or over have a base cost of $$290.$ Children $2$ or under have $$0$ base cost. A carry$-$on bag costs $$10.$ A first checked bag is free, second is $$25,$ and each additional is $$50.$ Given inputs of age, carry$-$on $(0$ or $1),$ and checked bags $(0$ or greater$),$ compute the total airfare. in java