I need a wordpress and java script expert to help configure some tasks wt my webiste

General information for the website: money transfer
Kind of development: Customization of existing website
Num. of web pages/modules: 2
Description of every page/module: I need someone who can help me with:
1) customize a currency converter....installed already in my wordpress website, i need it customized to fit mobile screen. WP theme is mobile responsive already but calculator doesn't fit screen on mobiles..Only issue with display.
2) Adjust service forms and Include a paypal link into 6 forms at submit button
3) Show how to hide and un-hide countries in the calculator installed in WP
4) Add a menu of different currencies for countries
5) Create an option that manually modifies currency exchange rates beside the online default link source already in place..
Description of requirements/features: Contact forms
Extra services needed: Customization
Extra notes: