A person has money worries and decides to invest in the computer industry. They want to know how the value will change over time. They used an exponetial regression model where the predictor is time in months and the response var is money measure in thousands of dollars.

Question

A person has money worries and decides to invest in the computer industry. They want to know how the value will change over time. They used an exponetial regression model where the predictor is time in months and the response var is money measure in thousands of dollars. 
Alpha 4.2 and Beta is 1.03 Based on this model, how much money (in thousands) will he have after six months? 
Workings 6-4.2*1.03 = 1674x1000=1674000 so where am I going wrong with this as I do not fully understand the question and need someone to explain this as a point for future reference if it came up again.