Currency Rate in Purchase Receipts

Hi Acumatica Community,

I created a Purchase Order with the following info

  50 PHP = 1 USD with 50 % DP to Supplier

  Processed the Prepayment with the same currency rate in Purchase Order

500 PHP = 10 USD (@50PHP per 1 USD)

When i tried to Purchase Receipts based on Purchase Order.

I noticed that the currency field is not editable

Is there a way to change this rate, based on what i set up in Purchase Order?

This should be 50 PHP per 1 USD. I should received this inventory at the amount of 500 PHP.

Seeking your assistance for this concern.

Thank you!