We have an elearning training created in Articulate Storyline 360 to modify.
To be added are approx. 30 screens in total in several modules + minor modifications, with the screens being templated and some will be repeated across modules, so all you need to do is select a template from elsewhere in the course and swap text/adapt. A fairly simple design, with a sample screen attached (though just one of the simpler ones).
Due to the nature of the project, it's probably best to bill by the hour or per project after a closer look. The total should not likely exceed a few hours of work at this point, but more in the future.
Please specify the hourly rate, detailed arrangements at a later stage.