OK,
First step go to find memory address that has value 1500000 (ddword)
Second step find new memory address = memory address which defined at 1s step minus (-) 1C (hex value), after that change its value from 3 t0 2
Third step, continue find one more new memory address this one defined by memory address at 1st step minus 4 (hex value), next change its value from 0 to 6
Now go back go back to Koins and Souls menu you you will see 1500000 runes was sold with price is 0 soul
Notice: You need to know how to a litle about hexa calculating to find a new memory address