Uncaught Error: number_format(): Argument #1 ($num) must be of type int|float, string given
in /web1/editionsglyphe/sitedit/wp-content/themes/sitedit/functions/sitedit.php on line 353

Call stack:

1. number_format('9,90', 2, '.', '')
   wp-content/themes/sitedit/functions/sitedit.php:353
2. sitedit_paypal('Le sac Editions Glyphe', '9,90', '', 'sidebar')
   wp-content/themes/sitedit/single-livre.php:50
3. include('/web1/editionsglyphe...dit/single-livre.php')
   wp-includes/template-loader.php:106
4. require_once('/web1/editionsglyphe.../template-loader.php')
   wp-blog-header.php:19
5. require('/web1/editionsglyphe/sitedit/wp-blog-header.php')
   index.php:17