Added "Cost of sales" to sales invoices tab

[shahabb]

@lubos

so transactions will be able to pull exchange rates from Settings directly just like it now works with inventory.

I thought it was done because of requirement by tax authorities.

Purchase Invoice spot exchange rates

Hi @lubos , I would like to suggest a spot rate system when processing supplier invoices. in Zambia the tax regulation is that the ROE to be used is dictated by the supplier and NOT the RECIPIENT which means in one day i can process multiple invoices with varying ROE’s i would suggest that as one is capturing a supplier invoice , a ROE box be included (the same way we enter discounts) if no change is made then the system rate should be used

Anyway, its better like this as Exchange rate can vary from transaction to transaction on same day. It might happen with Inventory too as COGS can vary from transaction to transaction on a single day but there would be only single cost defined under settings. I don’t know how you are going to solve that maybe by References or by Timestamps?