Forensic computer investigators must . find a way to get the evidence, no matter what it takes

develop new software to accomplish the investigation

render opinions based on demonstrable facts

bring in the computer and the criminal when they come to court

So don't take my word i'm not exactly a mathematical person but i would assume a. because while selling the soap every month you increase in sells so you would by 11 percent. the you would get the factor 0.89 which if i had to guess would be the monthly profit over 11 probably wrong tho