Percentage changes
Selected information from the financial statements of Perfectly Baked Cake Co.appears below: 
(a)Compute the percentage change in each of the above items from 2014 to 2015.Use a + or - to indicate increase or decrease. 
(b)Compute net income as a percentage of net sales in each year.(Round to the nearest one-tenth of 1%) 
Definitions:
Opportunity Cost
The cost of forgoing the next best alternative when making a decision, representing the benefits one misses out on when choosing one option over another.
Free Healthcare
A health service model where medical and hospital services are provided to individuals at no direct cost, typically funded by government taxes.
Affordable Care Act
A healthcare reform law enacted in March 2010, aimed at providing more Americans with access to affordable health insurance, improving the quality of healthcare and health insurance, and reducing healthcare spending in the US.
Poverty Level
The minimum level of income deemed necessary to achieve an adequate standard of living in a given country or area, often used to gauge the portion of the population living in poverty.
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