Ability to set unit costs that are not rounded to 2 decimal places

[Cobbles]

Currently, inventory unit costs in the UK are rounded to the nearest penny; e.g. 3.995 is rounded to 4.00. However, the unit cost of my item is 3.995, not 4.00 and this introduces errors when I enter multiple stock.

Please stop rounding up the unit costs! Why is it necessary in the first place?

Thanks!