Loss on capital assets is not allowed to set off against any other head of income other than Capital gains head. Long term capital loss can set off against Long term capital gains, Short term capital loss can set off against short term capital gains and long term capital gains. Unadjusted loss can be carryover to future assessment years.
In this case:
Capital loss deduction for 2019 -
|Short term capital loss against short term capital gain for 2019||$ 1,000|
|Short term capital loss carryover from 2018 against short term capital gain for 2019||$ 200|
|Long term capital loss against long term capital gain for 2019||$ 600|
Total capital loss deduction for 2019 - $ 1,800
Unadjusted Long term capital loss ($ 10,000 - $ 600) = $ 9,400 Carryover to future assessment years..