I have the following information:

Number of ALU instructions: 90000 and number of cycles per instruction is 2

Number of Jump/Branch instructions: 30000 and number of cycles per instruction is 4

Number of Load/Store instructions: 30500 and number of cycles per instruction is 6

Total number of instructions is : 150500

Average CPI is : (90000 * 2 + 30000 * 4 + 30500 * 6)/150500 = 3.209302326

However, in the sample output I have the CPI is : 3.202657

I think I’m missing something, any idea why my calculated CPI and the sample output CPI don’t match?