Data in 1st form, needs to appear in the 2nd subform if there is data on the line

[trident]

I have a form wherein there is a currency exchange rate, the fields are as follows:

Form 1
1-ID - Autonumber
2-Company Name
3-Currency
4-CurrencyRate

Form 2 (this is a breakdown or list of purchases)
1-ID-Autonumber
2-Form1ID-to connect to Form 1 ID
3-Quantity
4-CostPrice in EUR
5-CurrencyRate-will be taken from Form1


6-Total cost=quantity * (#4/#5)

I need that the currency rate in form 1 appears in form 2 for the number of lines they will enter.

How can I make this appear in form 2.

Thank you again for your assistance.

Trident

Sample: USD1.00 = EUR1.35

The fix number is the USD and the EUR can change to any currency.

I also have a subform inside this form.

[June7]

Form 2 is subform on form 1? Expression in textbox: =Parent.CurrencyRate

Calculate the Total: =quantity * (CostPrice / Parent.CurrencyRate)