product prices set to zero

about an hour ago notice all my products prices are set to zero,
so logged into my admin site, and took down the site,
First thing thought maybe my site got hacked, called hosting company and they didn't find anything wrong,
so I went to my each categories and I can view all my products and prices are there but not in Online catalog, so I downloaded the site and compare to last month backup and the count of files is the same , any suggestion what could of happened ?

It's more likely to be a database issue...

Can you (via phpMyAdmin) go look at the database products table?

There will be a column called: products_price

If the values there are all " 0 " or if the field is empty, you need to investigate why.

You may care to inspect your server log files (Access log and Error log) to see if there are reports of problems.

I have found the source of the problem,
the currencies were at zero except Euro , once I updated everything came back , now why would this happen ?

Look at this first - https://www.zen-cart.com/tutorials/index.php?article=96