how do i set conditional logic to only accept certain values in a currency field?

I have a matrix widget with currency fields that I have successfully got it to add up values.  I would like to restrict the values that can be put in the boxes but can't work out the right conditional logic settings to stop me entering any value.

When you say restrict the values, are you referring to the number of digits or the amount that can be placed in each box?

I would like to apologize, unfortunately, we cannot set a total number of digits or amount restrictions to each textbox in the matrix table.

The only way, I believe, you can set restriction for "greater than" or "less than" a certain value through condition is if you use the Number field from the Quick Tools.

Thanks for your quick reply Mike.  It is the amount I would like to validate as even though I have a hover box explaining the fees (£12, £14 or £16) we are still getting entries with £1.  I will give the number field a go :) 

I cloned your form and changed the input type to dropdown field. Like this they can only select 12/14/16 or 8/10/12. Calculation still works normally.

You can clone the demo form:

https://form.jotform.com/60782811976971 

Let us know if we can assist you further.   

Fantastic!  Thank you very much Carina :)