Basic customisation and edits to themeforest wordpress themes

Hi, I am looking for somebody with a good knowledge of wordpress to help with some edits on two separate wordpress websites. Both themes have been purchased and are already installed on our hosting, now we require some simple/basic customisation for our clients. I will provide more specific information to the bidders who are interested and feel they can help. The first theme is : [login to view URL] - The menu bar to be centred - The fonts used on the site changed to Helvetica - The borders around the boxes to be removed but the boxes to still be separated - Install "infinite scroll" plugin so you can just continue scrolling down the page and more content automatically loads ([login to view URL]) - Remove the thin lines around the menu bar and possibly just have a slightly bolder and black line underneath the menu bar? --------------------------------------------- The second theme is : [login to view URL] - I will provide full information about the edits on this page after we have discussed the first website, but the edits will be similar to the first website. --------------------------------------------- Please let me know how much you will charge to edit the first website, or your payment structure on how much you charge. Based on good quality work, this will lead to ongoing work of a similar nature. If you have any questions, please let me know. Many thanks