How to format Payment Amount in Positive Pay padded with zeros at left only, to create 10 total characters?

Hello,

I’m trying to create Payment Amount in a Positive Pay CSV file padded on the left to include 11 total characters like this example:

I’ve tried several formulas:

=PadLeft(CStr([APPayment.OrigDocAmt]),10,'0')

=PadLeft(CStr([APPayment.OrigDocAmt]),10.2,'0')

=PadLeft(CStr(Round([APPayment.OrigDocAmt],2)),10,'0')

=PadLeft(CStr([APPayment.OrigDocAmt]),12,'0')

The above formulas produce results that are padded at the left but include 2 extra digits on the right.

I thought Acumatica might be using Price/Cost Decimal Places field in Miscellaneous Settings section of Companies screen to set Decimal Places to 4…. however when I temporarily changed this setting from 4 to 2, it made no difference in my Positive Pay GI. 

Thank you in advance for your help!

Laura