Looking at the following partial calendar for April,when will individual tax returns be due? 
Definitions:
Output
The total amount of goods or services produced by a company, industry, or economy.
Marginal Product
The additional output generated by employing one more unit of a particular input, holding all other inputs constant.
Total Product
The overall quantity of output produced by a firm from a given quantity of inputs.
Short Run
In microeconomics, a period of time in which producers are able to change the quantities of some but not all of the resources they employ; a period in which some resources (usually plant) are fixed and some are variable.
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