Amy did all the standard Management Science courses in school. She knows that numbers can be deceptive. She also knows that implicit assumptions can play games with one’s perceptions. Still, there are two points she can’t get past no matter how she tries to rationalize: there’s a nuyen amount in the mystery file that corresponds exactly with each of the twenty-seven items she’s been trying to account for; and, the date for each of those figures corresponds with payment dates in her purchasing records.