P3 QUESTION PAPER 2012 DECEMBER, QUESTION 3,SECTION C

Good-day,

I have trade receivables at 260 Revenue 1600 and obviously 365

260/1600*365= 59.31 days payment, Below comes my question if the current system customers are taking 59, to pay their debt, If we improve system and reduce receivables payment days to 30 days, I would like help in calculating the days cash tight up?Or other words how find out the tight up cash since agreed with customer is 30 days,But customers are taking 59 days to make payment?

Thanks in advance