Decimal:          106          2        211         76 
Hex:             0x6a       0x02       0xd3       0x4c 
Bin:       0b01101010 0b00000010 0b11010011 0b01001100 

Add:            139       (0b10001011)
Xor:            247       (0b11110111)
Fletcher(a,b):  140,163   (0b10001100,0b10100011)

Data:

Decimal:          106          2        211         76 
Hex:             0x6a       0x02       0xd3       0x4c 
Bin:       0b01101010 0b00000010 0b11010011 0b01001100 

Determine the checksums, answer in decimal, 0x...hex, or 0b...binary:

Add:      
Xor:      
Fletcher: