To address the requirements for recording the purchase of marketable securities and their subsequent market value increase for Subhan Trading Corporation, we will follow these steps:
### Step 1: Record the Purchase of Marketable Securities
#### 1. Purchase of Kohinoor Mills Ltd Shares:
- **Date of Purchase:** 28 September 2020
- **Number of Shares:** 1,500
- **Par Value per Share:** Rs. 100
- **Purchase Price per Share:** Rs. 250
- **Total