Determine the stock balance using the sale balance. To find stock balance use column quantity sold. If sale is > 250, then commission is 10%; below is 5%. If stock balance is greater or equal to 25, then the remark should poor sale order wide good sale.

The sale is determined by multiplying the quantity sold by the unit price.

$$\text{Sale} = \text{Quantity Sold} \times \text{Unit Price}$$

The stock balance is found by subtracting the quantity sold from the initial stock. Note: The initial stock value is not provided in the problem and would be required for this calculation.

$$\text{Stock Balance} = \text{Initial Stock} - \text{Quantity Sold}$$

The commission rate depends on the calculated Sale value.

$$\text{Commission Rate} = \begin{cases} 10\% & \text{if } \text{Sale} > 250 \\ 5\% & \text{if } \text{Sale} \le 250 \end{cases}$$

The remark is based on the calculated Stock Balance.

$$\text{Remark} = \begin{cases} \text{Poor Sale} & \text{if } \text{Stock Balance} \ge 25 \\ \text{Good Sale} & \text{if } \text{Stock Balance} < 25 \end{cases}$$