Part A A firm always provides a 50% mark up on cost when quoting prices to customers. The cost of a job is $8,000. Required Calculate the following amounts: a. Gross profit b. Selling price c. Gross profit margin as a percentage of sales d. The Cost as a percentage of sales Part B A company maintains a gross profit of 30% of the sales price. If the goods have a cost of $2,100, what will be the selling price