我有以下数据。有人可以帮我逆向工程校验和计算吗？

Data                            Checksum
01 02 80 05 00 00 00 00 00       7d 8c
01 03 80 05 00 00 00 00 00       ae cb
01 04 80 05 00 00 00 00 00       b6 0c
01 05 80 05 00 00 00 00 00       65 4b
01 06 80 05 00 00 00 00 00       10 83
01 07 80 05 00 00 00 00 00       c3 c4
01 08 80 05 00 00 00 00 00       01 1d