Calculator allows you to apply calculations to your questions and the score can be carried from one question to the next. You can design your QUIZ or ONLINE STORE by combining Calculator and Payment question
Operators available - Add, Subtract, Multiply, Divide
Type of Calculation you can do depends on the question type you’re using

Example:
Product select: Shirt - $10, Trouser - $20, Suit - $50

Delivery Type: Standard Delivery - $2, Express Delivery - $5

Image Choice - Auto calculation in Question settings

If Auto calculation ON - then Author DO NOT need to specify Quantity in the Calculator.

If respondent selects “Shirt” then add “10” to Calculator.
So in above example, “10” is a unit price. So if respondent selects “3” in quantity then automatically (10*3 =30) - “30” will be added to Calculator.
If respondent selects “Standard Delivery” then add “2” to Calculator.
If respondent selects “Express Delivery” then add “5” to Calculator.
If Auto calculation OFF - then Author needs to specify Quantity in the Calculator

If respondent selects “Shirt” and Quantity “1” then add “10” to Calculator
If respondent selects “Shirt” and Quantity “2” then add “18” to Calculator
If respondent selects “Shirt” and Quantity “3” then add “25” to Calculator
If respondent selects “Standard Delivery” then add “2” to Calculator
If respondent selects “Express Delivery” then add “5” to Calculator
NOTE – Quantity option is only available in Image Choice question type.
RECALL CALCULATOR VALUE
Recall answers from previous questions by typing “@” in Question title, Description and Text Entry (Default value).
Calculations can be recalled by using - @Calculator@

MORE INFORMATION
How to connect to Stripe to collect online payments?
How to setup email notifications (including response PDF)?