How to define closing amount in report ?

This value in report is define the value which user have entered at the time of close shift.

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If at the time of shift close there is not entered any value then default it should display zero.

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NOTE : At the timing of shift close amount is not compulsory to enter but if user enter any value then in report it display at the time of shift close.

When apply Z or ZZ at that time also shift close so that value also consider in closing amount.