need change the monthly consumpption to annual consumption

The following data is the consumption pattern of certain materials in an organization. Categorize the materials based on ABC. A - 65 %, B - 25 and C - 10%. Group No of Items Monthly Consumption Price in RO 1 210 14000 42 II 140 525 787.5 420 7700 52.5 IV 770 6125 70 V 280 1400 210 VI 1120 10500 17.5 VII 945 8750 21 VIII 175 1050 700