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Construct a complete truth table for each of the following arguments. Then, using the truth table, determine whether the argument is valid or invalid. If the argument is invalid, specify a counterexample.
-S
∼T • U / ∼(T • U) • S
Variable Overhead Efficiency Variance
The difference between the actual hours taken to produce something and the standard hours expected, multiplied by the variable overhead rate.
Materials Price Variance
The difference between the actual cost of materials and the expected cost multiplied by the quantity of materials used.
Unfavorable
A term used to describe a variance or difference that negatively impacts financial performance.
Labor Rate Variance
The difference between the expected cost of labor at standard rates and the actual cost of labor incurred.
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