Index Match Smallest Return?

I am very competent using the index match formula and have incorporated this into many spreadsheets to auto-fill for avoiding input errors. The objective I am attempting now is to retrieve from a list of 2800 entries the smallest return on an index match formula.

From the data below if my Index Match formula uses C1 to index and match my return is always a7 (-12.7) the first in the list, where my desire is a return of a19 (-14.11). To complex this problem I often have duplicate amounts that need to be listed when they fall into my parameters. I have figured that the Small function allows me to assign first smallest, second smallest, and so forth.

I prefer not to use vlookup for simplicity and error avoidance issues.

a b c
1 amount Reason for Movement 2250
2 -183.252150
3 -366.612150
4 -61.1 2154
5 -91.652150
6 -4.34 2450
7 -12.7 2250
8 -2.98 2250
9 -2.98 2250
10 -69.372452
11 -0.6 2451
12 -4.49 2250
13 -4.49 2250
14 -4.14 2250
15 -4.7 2250
16 -4.55 2250
17 -4.85 2250
18 -1.41 2250
19 -14.112250
20 -8.47 2250