The total net profit before salaries:
\[
\text{Net profit before salaries} = \rupee5,60,000 + \rupee20,000 + \rupee50,000 = \rupee6,30,000.
\]
Omkar and Shiva share the profit equally (assuming equal sharing unless stated otherwise):
\[
\text{Profit share of Omkar} = \rupee6,30,000 \times \frac{1}{2} = \rupee3,15,000.
\]
After deducting Omkar's salary of \rupee20,000 (already included in his capital account):
\[
\text{Amount credited to Omkar’s capital account} = \rupee3,15,000 - \rupee20,000 = \rupee3,00,000.
\]
Thus, the total amount credited to Omkar's capital account is \rupee3,00,000.