Final answer:
The difference of $10,000 between the budgeted amount for supplies and the actual amount spent represents a variance, specifically a surplus.
Step-by-step explanation:
The discrepancy in the budgeted amount for supplies compared to the actual amount spent is known as a variance. A variance occurs when there is a difference between what was budgeted and what was actually spent or received. In this case, the HIM department budgeted $10,000 more for supplies than what was actually needed, which resulted in a variance.
This kind of variance, where less is spent than budgeted, is specifically referred to as a favorable variance or a surplus. It is important for departments to regularly monitor their budget variances to manage finances effectively and make adjustments for future budgeting.