I'm in need of a WP filter hook to be used during the validation process during checkout of the Shopp Plugin, a robust WordPress e-commerce plugin. I need the hook to prohibit checkout if there isn't a minimum total dollar amount in the cart at the time of checkout and return an error message. It's a simple thing, really. I can give you the files to look over, I just need this written as I don't know PHP.
9 freelancers are bidding on average $104 for this job
I have worked with the shopp plugin before (building a tshirt store based on Wordpress) and I can do this task for you in a matter of an hour or two. I can even do it today if you contact me in time (it's 18:40 here).