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Investigation of Variances Madison Company uses the following rule to determine whecher direct labor efficiency variances ought to be investipated. A direct labor efficiency variance will be investigated anytime the amount exceeds the lesser of $12,000 or 10 porcent of the standard labor cost. Reports for the past five weeks provided the following information: Required: Using the rule provided, identily the cases that will be irvestigated. Week 1: Week 2: Went 9 i Week 41 wetr 5