Solve the verification of a hexadecimal string

{Code ...} the other party tells the last 27 is the checksum algorithm. Because each byte is 8 bits, the sum is only 8 bits. Do not add the data above 27, then take the last 8 digits

D0 44 00 05 00 09 03 02 00 00 00 27 0D

The last 27 indicated by the recipient is the verification value.
The algorithm is summation.
Because each byte is 8 bits, the sum is only the last 8 bits.
Add the data before 27, and then take the last 8 digits

Reply content:

D0 44 00 05 00 09 03 02 00 00 00 27 0D

The last 27 indicated by the recipient is the verification value.
The algorithm is summation.
Because each byte is 8 bits, the sum is only the last 8 bits.
Add the data before 27, and then take the last 8 digits

Too little information is provided.