13 lines
308 B
C#
13 lines
308 B
C#
7 years ago
|
using System.Collections.Generic;
|
||
|
|
using System.Linq;
|
||
|
|
using YavscLib.Billing;
|
||
|
|
|
||
|
|
namespace Yavsc.Helpers
|
||
|
|
{
|
||
|
|
public static class BillingHelpers
|
||
|
|
{
|
||
|
|
public static decimal Addition(this List<IBillItem> items) => items.Aggregate<IBillItem, decimal>(0m, (t, l) => t + l.Count * l.UnitaryCost);
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|