function computerStore(arr) {
    let sum = 0

    for (let i = 0; i < arr.length; i++) {
        if (Number(arr[i]) > 0) sum += Number(arr[i])

        else if (Number(arr[i]) <= 0) console.log(`Invalid price!`)

        if (arr[i] === 'special' sum !== 0 || arr[i] === 'regular' && sum !== 0) {
            console.log(`Congratulations you've just bought a new computer!`)
            console.log(`Price without taxes: ${sum.toFixed(2)}$`)

            let taxes = sum * .2

            if (arr[i] === 'special') sum = (sum + taxes) - (sum + taxes) * .1
            else if (arr[i] === 'regular') sum += taxes

            console.log(`Taxes: ${taxes.toFixed(2)}$`)
            console.log('-----------');
        }
    }
    sum === 0 ? console.log(`Invalid order!`) : console.log(`Total price: ${(sum).toFixed(2)}$`)
}