Variance Computations and Explanations. Outdoor Company manufactures camping tents from a lightweight synthetic fabric. Each tent has a standard materials cost of $20, consisting of 4 yards of fabric at $5 per yard. The standards call for 2 hours of assembly at $12 per hour. The following data were recorded for October, the first month of operations: Required Compute all standard cost variances for materials and labor. Give one possible reason for each of the preceding variances. Determine the standard variable cost of the 1, 700 tents produced, separated into direct materials and labor