How can I change the currency?

Evening, 

Please could you help me as to how I can change the currency of this order form!?...it doesn't seem to give me an option to change it..?!.....

I will continue trying to wrk it out, while you get back to me!!

Many thanks

Have a good evening

Zinah. 

Please refer to this screenshot to know how you can change the currency:

If you need any further assistance, please let us know.