Urgent help me


(Guest)

Can anyone try to solve my problem becoz it had try many times and i am getting it wrong.So please

 (i) Trade debtor at the end of the year                90,000

(ii)Trade creditor in beginning of year               25,000

(iii)Trade creditor at the end of the year               45,000

(iv)Net working capital                                            1,20,000

(v)Stock turnover ratio                                              5.0 times

(vi)Sales for the year 2007                                       5,00,000

(vii)Gross profit ratio                                                    20% on the sales

Calculate  (a) Purchase (b)Avg collection period