Paasche quantity

Hi good evening, Appreciate your help with the below. I am following all the steps and still not matching with the answer (the book uses the formula so cannot match my workings) A company buys and uses five different materials. Details of the prices and quantities used for 20X1 (base year) and 20X2 (current year) are as follows; 20X1 MATERIAL QUANTITY UNIT PRICE F 21000 11 G 56000 22 H 62000 18 I 29000 20 J 31000 22 20X2 MATERIAL QUANTITY UNIT PRICE F 25000 12 G 52000 26 H 79000 18 I 35000 22 J 36000 23 What is the Paasche quantity index for these products? ----------------------------------------------------------------------------------------------------------------- The material indexes I managed to work out are below, am I correct till this step? MATERIAL INDEX F 119.05 G 92.87 H 127.42 I 120.69 J 116.13 The next step is to then multiply the indexes by the sales of 2012 (or the unit price?) and divide by the total sales (or unit prices?). I am varying from the answer.. No matter in what way I attempt it I cannot find what I am doing wrong :( Thanks, Sara