## Calculate the Tax based on the sum of two other boxes

Community Beginner ,
May 09, 2018

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I need a formula to add two boxes (subtotal and other charges) and then times that by the tax rate (which will be input at the point of sale). Can anyone else me write this equation? I am happy to email you my pdf or really anything to get this last step completed. --Thank you!

| Engaged

Ok, you named at least one of your field wrong.  It is "OtherCharges", not "Othercharges".  JS is case sensitive.

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## Calculate the Tax based on the sum of two other boxes

Community Beginner ,
May 09, 2018

Copied

I need a formula to add two boxes (subtotal and other charges) and then times that by the tax rate (which will be input at the point of sale). Can anyone else me write this equation? I am happy to email you my pdf or really anything to get this last step completed. --Thank you!

| Engaged

Ok, you named at least one of your field wrong.  It is "OtherCharges", not "Othercharges".  JS is case sensitive.

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Acrobat SDK and JavaScript

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May 09, 2018 0
13 Replies 13
Most Valuable Participant ,
May 09, 2018

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What's the format of the tax rate field? What are the names of the fields involved?

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May 09, 2018 0
Community Beginner ,
May 09, 2018

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I need to sum the "costsubtotal" and "Othercharges" these fields are categorized by number . The tax field is formatted by Percentage, this field is "Taxrate".

Thank you!!!!

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May 09, 2018 0
Most Valuable Participant ,
May 09, 2018

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Under the Calculate tab of the field where you want the result to appear, in the Simple Field Notation section, enter:

(costsubtotal + Othercharges) * Taxrate

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May 09, 2018 0
Community Beginner ,
May 09, 2018

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So I plugged this in, and the amount isn't showing up. Shouldn't it auto fill?

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May 09, 2018 0
Most Valuable Participant ,
May 10, 2018

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Yes. Did you change the value of one of the fields, though?

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May 10, 2018 0
Community Beginner ,
May 10, 2018

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Yes, I have tried a bunch of different changes, and the CostTaxRate box isn't changing. It is blank.

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May 10, 2018 0
Engaged ,
May 10, 2018

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Can you share the file?  because this is quite a simple task.  There is no reason it should not work.  Did you copY/pasted the name of your fields in the thread to make sure there is no typos?

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May 10, 2018 0
Community Beginner ,
May 10, 2018

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I am happy to share. I agree that this should be simple, and I just perplexed as to what I am doing wrong. I don't see a upload a document link on here, do we need to use email?

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May 10, 2018 0
Engaged ,
May 10, 2018

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May 10, 2018 0
Community Beginner ,
May 10, 2018

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Here I think this should work.

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May 10, 2018 0
Engaged ,
May 10, 2018

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Ok, you named at least one of your field wrong.  It is "OtherCharges", not "Othercharges".  JS is case sensitive.

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May 10, 2018 0
Community Beginner ,
May 10, 2018

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Wow all that because of a c/C. Thank you for all your help, it is so greatly appreciated.

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May 10, 2018 1
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Engaged ,
May 10, 2018

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This is 90% of errors encountered when facing a simple task.  Always copy/paste field names and variables whenever possible avoid errors.  Sadly (but sometimes helpfully) JS stops as soon as an exception is thrown.  this sometimes helps identify at what place the exception was thrown.

Also, activate the console in case of error.  You can find this option in edition/preference/javascript.  When an error says it can't find a field, it's beacause the name is wrong.

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May 10, 2018 1