Salary - Basic + DA - is it 40 % of the Gross? or is it 15000?

Can i get the standard salary calculation For Year -2018
If Eg = Gross 67,231.00
Basic + DA - is it 40 % of the Gross ? or is it 15000
HRA - 20%OF GROSS
L.C - 10% OF GROSS
Attn. Bonus - standard calculation?
LTA - standard calculation?
MEDICAL - standard calculation?

These parameters vary from company and there is no standard bificurcation. You will have to see your company policy and practice

You need to refer the salary and wages paid in similiar category of your establishment of State, Central & Public Sector.