Why do the approved and actual values sometimes differ?
There may be a small discrepancy between the approved cost of a standard line and the actual cost. For example, the approved price might be 61,000 RUB but the actual expense turns out to be 61,160 RUB. This is due to how the system is set up. The final total will be 61,000 RUB.
These discrepancies do not affect the amount shown on your bill (i.e. your invoice will list the approved amount.)