function fruitShop(fruit, day, quantity) {

    quantity = Number(quantity);

    let price = 0;

    if (day == "saturday" || day == "sunday") {

         if (fruit == "banana") price = 2.70;
             else if (fruit == "apple") price = 1.25;
                else if (fruit == "orange") price = 0.90;
                     else if (fruit == "grapefruit") price = 1.60;
                         else if (fruit == "kiwi") price = 3.00;
                             else if (fruit == "pineapple") price = 5.60;
                                 else if (fruit == "grapes") price = 4.20;

    } else if (day == "monday" || day == "tuesday" || day == "wednesday" || day == "thursday" || day == "friday") {

        if (fruit == "banana") price = 2.50;
              if (fruit == "apple") price = 1.20;
                 if (fruit == "orange") price = 0.85;
                     if (fruit == "grapefruit") price = 1.45;
                         if (fruit == "kiwi") price = 2.70;
                             if (fruit == "pineapple") price = 5.50;
                                 if (fruit == "grapes") price = 3.85;

    } if (price > 0) {
        console.log(price * quantity.toFixed(2))
    } else {
        console.log("error")
    }





}
fruitShop("apple", "tuesday", "2")