let zhifubao10 = 32500 - 19000
    let zhifubao10Time = (new Date() - new Date("2017-10-20")) / (1000 * 60 * 60 * 24) | 0

    let zhifubao12 = 32500
    let zhifubao12Time = (new Date() - new Date("2017-12-20")) / (1000 * 60 * 60 * 24) | 0

    let zhifubao1 = 32500
    let zhifubao1Time = (new Date() - new Date("2018-01-20")) / (1000 * 60 * 60 * 24) | 0

    let zhifubao2 = 32500
    let zhifubao2Time = (new Date() - new Date("2018-02-20")) / (1000 * 60 * 60 * 24) | 0

    let zhifubao3 = 17124
    let zhifubao3Time = (new Date() - new Date("2018-03-20")) / (1000 * 60 * 60 * 24) | 0

    let zhifubao4 = 17124
    let zhifubao4Time = (new Date() - new Date("2018-04-20")) / (1000 * 60 * 60 * 24) | 0

    let rest = (6583 + 608) * 3 + (9500 + 433)

    let m = [
        [zhifubao10, zhifubao10Time, '10'],
        [zhifubao12, zhifubao12Time, '12'],
        [zhifubao1, zhifubao1Time, '1'],
        [zhifubao2, zhifubao2Time, '2'],
        [zhifubao3, zhifubao3Time, '3'],
        [zhifubao4, zhifubao4Time, '4'],
    ]

    document.write(m.reduce((pre, arr) => {
        let [price, time, month] = arr
        let c = price * 0.0005 * time
        return pre + `${month}月：利息 <span>${c}</span> + <span>本金 ${price}</span> = <span>${price + c}</span><br>`
    }, ""))

    document.write('信用卡剩余' + rest + m.reduce((pre, arr) => {
            let [price, time] = arr
            return pre + ` + ${price * 0.0005 * time + price}`
        }, '') + '<br>一共：')

    document.write(rest + m.reduce((pre, arr) => {
            let [price, time] = arr
            return pre + price * 0.0005 * time + price
        }, 0))