Financial ratio calculation for MVAT Audit Report

hello everyone,
my boss has given me the task of calculating financial ratios for the vat audit of a clients.

i have not done much work in vat. please some one explain me the following terms if possible then with the help of example/excel file.

1. Net Turnover
2. Net Sales Turnover
3. Net Sales in Maharashtra State
4. Total Sales
5. Cash Sales.
6.Cash Purchases
7. total Purchases
8. Local Sales
9. net Interstate Sales
10. net sales from
row N

waiting for ur reply urgently.
my id abhipcc @ rediffmail.com