werun-wxapp/utils/totalprices.wxs

var totalprices = function (count, price) {
    var count=count;
    var price=price;

    return (count * price).toFixed(2)
}
var sum = function (allPrice, discounts) {
    var allPrice=allPrice;
    var discounts=discounts;

    return (allPrice - discounts).toFixed(2)
}
var add = function(price = 0 ,prices = 0){
    return (price+prices).toFixed(2);
}
var tofd = function(num,t_num = 2){
    return num.toFixed(t_num)
}
var math = function(val){
    return Math.abs(val)
}
module.exports = {
    totalprices: totalprices,
    sum:sum,
    add:add,
    tofd:tofd,
    math:math
}