You wish to calculate the commission on sales. The commission is 6% on all sales that are at least 20% above cost.

To calculate the commission on sales, you would need to determine if the sale meets the criteria for commission. Here are the steps to calculate the commission:

1. Determine the cost of the item: The cost refers to the amount at which the item was purchased. Let's say the cost of the item is $100.

2. Calculate the minimum sale price to qualify for commission: To be eligible for commission, the sale price must be at least 20% above the cost. To calculate the minimum sale price, multiply the cost by 1.2 (1 + 0.2). In this example, it would be $100 * 1.2 = $120.

3. Calculate the commission amount: If the sale price is at least 20% above the cost, you can apply the commission rate to the total sale price to calculate the commission amount. Assuming the sale price is $150, which is higher than the minimum sale price of $120, you can calculate the commission as follows: commission = sale price * commission rate. In this case, commission = $150 * 0.06 = $9.

Therefore, the commission on the sale would be $9.