The table below shows the probability distribution of past records of the number of breaks of a heavy-duty document scanning machine in a week. It is estimated that each breakdown costs the company $4,930in lost business. Find thestandard deviationof the weekly cost from breakdowns of this machine.

No. of Breaks (X): 0 1. 2. 3. 4.

P(X): 0.24 0.26 0.24 0.25 0.01