If a customer is set to use the system’s ‘Default Price’, they will receive the ‘Base Price’ as configured for your sales system. For sites using more than one front end sales system, this will be determined by the ‘Base Price’ of the front end system being used.
If you run both Point of Sale and Invoicing, with base prices of 2 and 5 respectively, then a sale for an account customer configured for ‘Default Price’ will get price code 2 at POS, however when processing in Standard Invoice they would get price code 5.
N.b – the above assume no other special pricing is applicable.