static public void CalculatePersonTotalMoney(List <Person> personList, List <Thing> thingList)
{
foreach (var item in personList)
{
item.TotalMoney =
DataProcessing.CalculateMoney(item.Pen, thingList.Sum(x => x.Pen)) +
DataProcessing.CalculateMoney(item.Pen, thingList.Sum(x => x.Pencil)) +
DataProcessing.CalculateMoney(item.Eraser, thingList.Sum(x => x.Eraser)) +
DataProcessing.CalculateMoney(item.Ruler, thingList.Sum(x => x.Ruler)) +
DataProcessing.CalculateMoney(item.LiWhite, thingList.Sum(x => x.LiWhite));
}
}