If you don't understand much, just do it without a pointer. Go in the shop to the knifes (for example the redduck bat) and select it (don't buy!).
Search for 2343 4-bytes. Select it again and change the days to 15. Search for 2345. Change all values to 2842 and freeze them. Go AVA, buy the redduck bat and BOOM you got your incredibly cheap item xD (make sure you see another item than the redduck bat and another price in the buy window before u buy it).