Drupal Commerce works with different currencies, the field Price is customizable and can be displayed without decimals, with a prefix or suffix, can be struck-through by the action. More in detail.
Article is translated from russian by Google Translate and corrected by tlito.
Translation field Price, Order Total, see the tutorial (in russian) "Drupal Commerce Basic setup".
Disk usage sometimes requires optimization when the disk space is not cheap, but you have a lot of images. Basic function of image optimization is the option "Maximum image resolution" in the settings of field Image. Setting, say a maximum of 1200 by 1500 pixels, you will force Drupal to compress large images to this size.
But what if you want to convert PNG (which weigh 3-4 times larger than JPG) in JPG format? How to tune the compression feature pictures?