A 3-column table has 7 rows. The first column is labeled pies produced per day with entries 1, 2, 3, 4, 5, 6, 7. The second column is labeled total cost with entries 1, 1. 50, 1. 75, 2. 25, 3. 25, 5. 00, and 7. 25. The third column is labeled marginal cost with entries 1, 0. 50, 0. 25, 0. 50, 1, 1. 75, and 2. 75. Use the information shown in the chart and the drop-down menus to answer these questions. The marginal cost to produce the first pie is. The marginal cost for producing the fourth pie is. The difference in marginal cost between the production of the second pie and the seventh pie is.