Using the following data, the Wilcoxon Signed-Rank hypothesis test is used to test the hypothesis that the test results of a treatment after training are greater than the test results before the treatment. What is the sum of the ranks? 
Definitions:
Demand Elasticities
Demand elasticities measure how sensitive the quantity demanded of a good or service is to changes in its price, income levels, or other factors.
Market Demand
The total quantity of a good or service that all consumers in a market are willing and able to buy at various prices.
Competitive Price-Searcher
A market condition where firms continually search for the best prices to maximize their profits in a competitive environment.
Economic Efficiency
The optimization of resources to best fulfill the needs and wants of individuals and society with the least waste.
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