How to add cost calculation?

- are there anywhere that i can add calculation of the cost .. say if the person fill in 5 names of the participant  - it will equal to 5 times whatever the cost for the registration depending on the date? 

Hello,

You can use calculation widget of Jotform.

Please find the user guide to learn how to use it : https://www.jotform.com/help/259-How-to-Perform-Calculation-in-the-Form

If you need further clarification, do not hesitate to ask.