Assume that three identical units of merchandise were purchased during October,as follows: 
Assume one unit is sold on October 31 for $28.Determine cost of merchandise sold,gross profit,and ending inventory under the LIFO method.
Definitions:
Sample Size
The number of individual observations or data points collected in a sample from a larger population.
ANOVA
A statistical method, short for Analysis of Variance, that assesses potential differences in means among multiple groups.
Assumptions
Assumptions are accepted truths or beliefs that are taken for granted without proof, used as a basis for reasoning, discussions, or theoretical modeling.
Nonparametric Test
A type of statistical test that does not assume the data follows a normal distribution or any other specified parameters.
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