Customize paid theme

General information for the website: i need to add image slider
Kind of development: Customization of existing website
Description of every page/module: Hello,
i paid this theme : http://themeforest.net/item/nanomag-responsive-wordpress-magazine-theme/10036095
and installed in this site : http://nitracts.com/
i need to add image slider just like this one here : https://arabic.rt.com/ check this snapshot : http://prntscr.com/bnzw0f
i need to do it as soon as very possible ,
let me know please if you able to do it within cheap price

Thanks
Description of requirements/features: once you understand how this theme word you can start work on it i really want to have it done today any possible !
Extra notes: