class Menu {
    #offer1 = 10;
    #offer2 = 20;
    constructor(val1, val2) {
        this.val1 = val1;
        this.val2 = val2;
    }
    calTotal(){
        return (this.val1 * this.#offer1) + (this.val2 * this.#offer2);
    }
    get total(){
        return this.calTotal();
    }
}
 
const val1 = new Menu(2,0);
const val2 = new Menu(1,3);
const val3 = new Menu(3,2);
console.log(val1.total);
console.log(val2.total);
console.log(val3.total);