text: **Example**
  A customer has a Storwize V5030 utility model with 2 TB nearline disks, for a total system 
  capacity of 48 TB. The base subscription for such a system is 16.8 TB. During the months 
  where the average daily usage is below 16.8 TB, there is no additional billing. 
  
  The system monitors daily provisioned capacity and averages those daily usage rates over 
  the month term. The result is the average daily usage for the month. 
  
  If a customer uses 25 TB, 42.6 TB, and 22.2 TB in three consecutive months, Storage 
  Insights calculates the overage (rounding to the nearest terabyte), as listed in Table 2-2. 
  
  Table 2-2 Overage calculation 
  
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              [html]<thead><tr><td>Average daily</td><td>Base</td><td>Overage</td><td>To be billed</td></tr></thead><tbody><tr><td>25</td><td>16.8</td><td>8.2</td><td>8</td></tr><tr><td>42.6</td><td>16.8</td><td>25.8</td><td>26</td></tr><tr><td>22.2</td><td>16.8</td><td>5.4</td><td>5</td></tr></tbody>
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