Hello, DocEngineer
The "simple notation" option under value calculation properties for the "amount1" field would likely be the easiest way to accomplish this, assuming that your "0.67" is a static value that will never change.
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With this mode of calculation, any existing "field name" can be written out in place of a static number, with standard operators present for extended actions. Note that if a field name has "spaces" present, you will need to place that name in quotation marks. Ideally, field names should use Underscores instead of spaces, to simplify such cases.
Also, non-numeric characters have a null value for the purpose of these calculations, as an example (i used 0.68 as the multiplier to get more "readable" numbers in my examples here):
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If instead the value of that multiple may have some variance, you may want to create a secondary field for holding that cost, which you can adjust the value of, and then use the "product" calculation method instead:
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Kind regards,
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