Vath Corporation, which makes landing gears, has provided the following data for a recent month: 
Required:
Determine the rate and efficiency variances for the variable overhead item supplies and indicate whether those variables are favorable or unfavorable. Show your work!
Definitions:
Random Variable
A numerical variable influenced by the randomness of an event.
Standard Normal
A normal distribution with a mean of 0 and a standard deviation of 1, used in statistics to simplify calculations and analysis.
Random Variable
A variable with values that are numerical manifestations of random happenings.
Standard Normal
A typical distribution that has a mean value of 0 and a standard deviation value of 1.
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