Booking Pricing and Listing Form Modifications for WordPress Platform

We are developing a multivendor marketplace for local artists bookings and ticket sales for events. We are working with Listeo Directory Theme in WordPress and customizing service listings as Artist’s profiles. The job tasks are the following: 1. a) Fix total cost calculator for service listings. It has a bug where it doesn’t display in the mentioned type of listings. b) Create a default extra service called “Personalizado” to allow for custom job requests (just for service listings), whose price is to be defined further on the checkout process. The category/item must have a checkbox to be disabled in the user add listing form. Non editable field for users. When selected on the listing, it should have a custom text to be displayed in the total cost calculator. c) Create a button next to service items to make them selectable on the pricing section. Make the selected item be displayed in the booking widget “extra services” field. Keep the selection limited to a single item. Delete the “extra services” counter. d) Even out the margins of the sidebar and the widgets contained in it. Make it float centered to the screen to make it responsive to screen sizes. Prevent either of the widgets to fall outside the user screen. e) In the Pricing section, make the top/bottom margins of the rows narrower to allow for more rows to be displayed on the screen. Note: The modifications mentioned in this point must be applied exclusively to service listings. 2. a) Make the preview of a listing creation/editing look exactly like the listing page (Minus the booking widget column, whose space is taken by the user’s dashboard column on the left). b) Make the selection of a features (profile) picture a mandatory step for a listing publication. Create an error message when an image from the gallery hasn’t been selected. c) Limit the single file upload format admitted in the ficha técnica field to .pdf exclusively. Create an error message when the file format is not admitted. Note: The tasks in this point apply to all listing categories.