function fruitShop(input){
    let typeOfFruit = input[0];
    let dayOfWeek = input[1];
    let quantity = Number(input[2]);

    let priceForFruitPurchase = 0;

    if(dayOfWeek !=='Monday' && dayOfWeek !=='Tuesday' && dayOfWeek !=='Wednesday' && dayOfWeek !=='Thursday' && dayOfWeek !=='Friday' &&
    dayOfWeek !=='Saturday' && dayOfWeek !=='Sunday' ) {
        console.log('error');
    }

    switch(dayOfWeek){
        case 'Monday':
        case 'Tuesday':
        case 'Wednesday':
        case 'Thursday':
        case 'Friday':
            switch(typeOfFruit){
                case 'banana':
                    priceForFruitPurchase = quantity * 2.50;
                    break;
                case 'apple':
                    priceForFruitPurchase = quantity * 1.20;
                    break;
                case 'orange':
                    priceForFruitPurchase = quantity * 0.85;
                    break;
                case 'grapefruit':
                    priceForFruitPurchase = quantity * 1.45;
                    break;
                case 'kiwi':
                    priceForFruitPurchase = quantity * 2.70;
                    break;
                case 'pineapple':
                    priceForFruitPurchase = quantity * 5.50;
                    break;
                case 'grapes':
                    priceForFruitPurchase = quantity * 3.85;
                    break;
                default:
                    console.log('error')
                    break;
            }
            break;

        case 'Saturday':
        case 'Sunday':
        switch(typeOfFruit){
            case 'banana':
                priceForFruitPurchase = quantity * 2.70;
                break;
            case 'apple':
                priceForFruitPurchase = quantity * 1.25;
                break;
            case 'orange':
                priceForFruitPurchase = quantity * 0.90;
                break;
            case 'grapefruit':
                priceForFruitPurchase = quantity * 1.60;
                break;
            case 'kiwi':
                priceForFruitPurchase = quantity * 3.00;
                break;
            case 'pineapple':
                priceForFruitPurchase = quantity * 5.60;
                break;
            case 'grapes':
                priceForFruitPurchase = quantity * 4.20;
                break;
            default:
                console.log('error')
                break;
        }
        break;
    }

    console.log(priceForFruitPurchase.toFixed(2));
}

fruitShop(["tomato", "Monday", "0.5"])