Sage 100 : PO with custom Charge LineItem is missing in Receipt of Goods

Hi,

I have a query on PO and Receiving module. When a charge/expense line item is created in PurchaseOrder and a Receipt of Goods is created against it, those lines are not adopted in receiving.

However when I manually add a new charge Receipt of Goods line item and create an invoice, I see the hidden ones of PO and the manually added line of Receipt of Goods in Invoice.

Even in total cost, charge item type cost is excluded. Screenshot below.

PO Total : 847 Receiving Total: 789. `/FRGHT`,`/CHARGE`, `/EXPENSE` are Expense Types here created on the fly when adding line items

I see DUTY and FREIGHT as inbuilt charge type in Totals tab. However, why are other custom charge types missing?

1.Could you give me a detailed explanation of Charge Type Line Item.

2.Significance of Landed Cost for Charges?

3.Info on usage of Special Item (prefix with *) and is it different form Inventory line item? 

Thank you

-Vaishnavi