What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No signup required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.

Why calculation in the form is not working properly?
Asked by dotransferme on January 25, 2017 at 09:27 AMHello,
We have field on form https://form.jotform.me/70242331183445 in section where customer can select: One Way or Round Trip
If customer select round trip we have add following formula to double the total price of transfer:
And it works! BUT, when One way is selected (after checking Round Trip) the total price in price field disappears!
Please assist us to solve this problem!
In ideal, when Round Trip is selected it must double the total sum and when One Way is selected it must show the ordinary price!
Please assist!
https://form.jotform.me/70242331183445

JotForm Support
The problem is in how you did your Round trip calculation. So whenever that option is selected a price is calculated and inserted in Total field. So even if you just click round trip button several times in a row it will add the total price every time.
Also, I don't see the calculation or condition that refers to oneway selection.
So that's why nothing happens when it is selected.
My advice is the following:
1. You created conditions that calculate the price of the trip based on locations and that is ok.
2. Those values are going to Total field, which is hidden on the form, and that is fine as well.
3. Include one more field in the form call it Total2 or something that will calculate the total price plus the oneway or round trip price.
So when your users select the locations, total price will go to Total field (the hidden one) and then when they select the oneway/roundtrip, based on that selection Total price will be multiplied with price for oneway and price for roundtrip and then that price will be in Total2 field(which is the total price actually). For oneway price, I assume it will be the same actually so you can simply multiply with number one.
Hope this helps.
Please let us know your thoughts.
Thank you!

Thanks a lot I will try now to do it!)
I have another question:
based on number of passengers (number 1,2,3,4 or 5,6,7,8,9) we want field to add different amounts. for example if in field Number of Passengers is inputed digit from 6 to 15 we want to add 30$ to total price! If from 16 to 30 we want to add $50
is it possible and how can we create it?

JotForm Support
You're welcome.
That should be doable wit conditions, but you will have to use number field instead of text field for number of passengers. And that's because then you can use the range condition:
And then you can add 30$ to the total price. Now, if you experience similar issue like the initial one then you can put one more field to hold the middle total value that later you can use to add 30$ or 50$ to it. And then that value to show in the end total field.
Hope I was able to make it understandable. :)
Let us know how it worked for you.
Thank you!

Thanks Nik_C for your assistance this second case lookes more easy.
But I am unable to create One Way or Round Trip case! (( Maybe you can assist me in this also?

JotForm Support
I'm glad I was able to help.
Sure, here is how I achieved what you need:
I added some new text fields:
1. So, Total Price From Location is what you actually created with conditions, it is showing the price based on selection of locations.
2. Then Total Price From Location one way is the same price but I put it there so we can have it separately. As you can see in condition:
3. Total price from location roundtrip is total price one way multiplied with 2:
4. And finally Total price in USD is the total price field there I created this calculation:
It is sum of Total price one way + Total price round trip + VIP.
Here is my clone of your form so you can have a closer look: https://www.jotformpro.com/form/70244485196966
As you can see there, I'm revealing all fields, it's easier for tests. But you should hide Total price one, Total price round trip and Total price from the location.
If you have further questions please let us know.
Thank you!