This question was asked in TCS in GST (Dec 2018)
In ur example less tcs @.5% rs 450 should be added in the gst payable amount as it is not payable it is receivable 
Pls check it one more time 
As in local sale input is more than output and there it is not gst payable hence 450 should be added in that amount
Neha Gairola's image