The reason firms do not always increase their production is based on the following factors:
1. Fixed and Variable costs: The fixed and variable costs are used to decide the number of goods to produce.
2. Average Fixed costs: When a firm increases its production, the average fixed costs may increase.
3. Fixed costs: The overhead cost is the fixed costs in the short-run.
Thus, each of the three blanks is filled with correct answer. Note that the every business entity incurs both fixed and variable costs.
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