Formatting financial statements in commn size can eliminate inherent bias' that usually occurs whenever analyzing companies of differing sizes. Common size also allows for the analysis of a company over various time periods rapidly, e.g. revealing what percentage of sales is cost of goods sold and how that value has changed over time.
Hallador Energy Co, https://halladorenergy.com/overview/default.aspx, SIC Code: 1222, BITUMINOUS COAL UNDERGROUND MINING
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