My client, https://www.lakesidecleaningservices.com/, needs the ADD-ONs under the ADD-ONS category on this page https://www.lakesidecleaningservices.com/pricing added to their booking services. So when someone books a service, they have the option to add all the add-ons if wanted and the final price be a tally of all the add-ons selected and the original booking option. What would the cost be for this scope of project?