Dynamic AX: Unit Prices That Have More Than Two Decimals

On most Dynamics AX 2012 projects, there is confusion around how to deal with unit prices where the decimal precision is greater than 2 (e.g. fuel $1.1638 per L). Many projects go down the road of customizing AX to achieve this.
— Read on us.hitachi-solutions.com/blog/dynamics-ax-deal-unit-prices-two-decimals/