In Kartris, every product must have an least one 'version'
under it. A version is the record that contains the price, tax rate,
SKU (unique item code), item weight and stock quantity
information.
If you create a 'single version'
product, a new version is automatically created. However, you must
still go to the 'versions' tab in order to enter a price and other
minimum information, as well as to set the new version
live.
For other product types, you must also
create at least one version before the product is complete and can
be visible on the front of the web site to be purchased.
RRP, or recommended retail price, let's you display a guide
price on your site for the manufacturer's recommended pricing,
typically in order to demonstrate how much cheaper than the norm
your price is.
To activate this, you must first
turn the RRP display on with the
frontend.versions.display.showrrp config setting, then
you can set a value for RRP for each version. Note that this only
shows on some version types; options products do not display this
for example, because the price of options products is not fixed -
and providing an RRP for each permutation of options would be
unnecessarily complex for what is essentially just a guide and
marketing device.