Prepayments to suppliers

Purchases are possible make on the credit as it is already in weberp,
but in life very often suppliers ask for prepayments.

It is necessary to make possibilities enter invoice from suppliers
against purchase order.

Currently algorithm for purchases in weberp is:

1. Insert Purchase order
2. Receive goods
3. Enter supplier invoice against goods received
4. Pay for goods.

With prepayment algorithm is following

1. Insert Purchase Order
2. Enter supplier invoice against Purchase Order (it is possible more
than one invoice against Purchase Order)
3. Pay according invoice
4. Receive goods
5. Pay rest amount

If we do prepayment then amounts books in Asset side in balance sheet
as prepayment

Dr Prepayment for supplier
Cr Cash/Bank

When we receive goods

Dr Inventory
Cr Prepayment

To make easy life we may use Creditors Control GL Account also as
prepayment account only in balance sheet report account separate in
two:
- Supplier accounts balance in credit show as Creditors Control GL Account:
- Supplier accounts balance in debit show as Prepayments