Step 1: Journal Entries for Issuance of Shares.
When the company issues the shares, the following journal entries are passed:
\[
\text{Bank Account} \quad 1,00,000 \quad \text{(5,000 shares × Rs. 20)}
\text{To Share Capital Account} \quad 1,00,000
\]
\[
\text{Bank Account} \quad 1,25,000 \quad \text{(5,000 shares × Rs. 25)}
\text{To Share Capital Account} \quad 1,25,000
\]
\[
\text{Bank Account} \quad 1,50,000 \quad \text{(5,000 shares × Rs. 30)}
\text{To Share Capital Account} \quad 1,50,000
\]
Step 2: Journal Entries for Non-Payment by Sohan.
Sohan did not pay the first and second calls on his 50 shares, which means:
\[
\text{Share Forfeited Account} \quad 1,250 \quad \text{(50 shares × Rs. 25)}
\text{To Share Capital Account} \quad 1,250
\]
\[
\text{Share Forfeited Account} \quad 1,500 \quad \text{(50 shares × Rs. 30)}
\text{To Share Capital Account} \quad 1,500
\]
Step 3: Journal Entries for Forfeiture and Reissue of Shares.
The forfeited shares were reissued for Rs. 3,000:
\[
\text{Bank Account} \quad 3,000 \quad \text{(Reissue of 50 shares)}
\text{To Share Capital Account} \quad 2,500
\text{To Share Forfeited Account} \quad 500 \quad \text{(Balance transferred from Share Forfeited Account)}
\]
Step 4: Conclusion.
The journal entries above record the issuance, forfeiture, and reissue of shares in the books of R Co. Ltd.
Final Answer:
\[
\boxed{\text{The journal entries record the application, allotment, forfeiture, and reissue of shares.}}
\]