Our client has customers for example a customer named "XYZ" has 3 items installed at their location.
Item# 1 Installation Date: 01-08-2008
Item# 2 Installation Date: 01-08-2008
Item# 2 Service Bloked Date: 15-08-2008
Item# 2 Service Resumed Date: 21-08-2008
Item# 3 Installation Date: 21-08-2008
Billing Date: 31-08-2008
How can I bill for these 3 items deducting the amount for blocked days?
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