Is this calculation of the Notice period deduction correct or wrong if the Company adjusted the balance left in the Notice period?

Hi All, Is this calculation of the Notice period deduction correct or wrong if the Company adjusted the balance left in the Notice period. The salary paid 31 days in December, and the notice period deducted 6.5 days? As per company policy, the notice period is one month.

Resignation Date =14-Dec
Last working days =13-Jan
Actual Last working days =31-Dec

Short Notice days =13
Closing Leave Dec =6.5
Notice days Adjusted (Balance Leave) =6.5

Balance notice days Deduction =6.5