Zapier is pretty limited compared to jobber's api. You can create a database and feed it from Jobber using Jobber's API. From there, you can do pretty much anything. Like using custom fields as merge tags in email communications which allows you to send mass emails offering a service that has the custom price for each client individually, in the email. For example, if you have a fert service for lawns and you price based off of turf sq ft. you can send an email to thousands of customers at once and they will all see their unique price for that service, in the email.