Calculating the Price

If the selling price equals to $42 and the production cost equals to $14, the mark up is ______________%.

If the production cost equals to $18, and the profit margin is 50%, than the selling price equals to $____________.

If the production cost equals to $200, and the mark up is 50%, than the selling price equals to $____________.

If the selling price equals to $60, and the profit margin is 50%, than the production cost equals to $____________.

If the mark up equals to 75% and the selling price equals to $105, then the production cost equals to $____________.

If the production cost equals to $24, and the profit margin equals to 40%, then the selling price equals to $____________.

If the selling price equals to $60, and the mark up is 20% , then the production cost equals to $____________