With this water- and dust-resistant calculator, there’s no need to worry about exposure to water, dust, or grime. It is recommended for use even at open-air markets, street stalls, and other outdoor businesses and at shops that sell fresh food.

Cost：

What is the cost of an item that sells for $150 after a 30% margin is added?

Selling Price：

What would the selling price be for an item that costs $120 after a 40% margin is added?

Margin：

What is the margin on an item that costs $1,000 and sells for $2,000?