upgrade joomla 1.5 sites to 1.5.26

I have 7 joomla 1.5 websites that need to be backed-up first then updated to joomla 1.5.26. They will need to be reviewed once updated to make sure the site is working properly. This project needs to be done today. 2 of the sites are ecommerce sites using Virtuemart but they aren't very complex. The other 5 sites are very basic joomla sites. Budget is $75