Western Chair Company Western Chair Company planned to make 43,000 chairs last year. Actual volume was information from last year is shown below: 44,000 chairs. A summary of Western's manufacturing cost Standard Actual Cost Variable Costs Cost per Unit $16.00 12.00 per Unit $16.34 10.92 Direct Materials Cost Direct Labor Cost Additional manufacturing cost information includes the following. Each chair is expected to require 8 board feet of lumber at a cost of $2 per board foot. Western actually used an average of 8.6 board feet of wood per chair, which it acquired for $1.90 per board foot. Each chair is expected to require 1.5 hours of direct labor at a rate of $8.00 per hour. Western actually used 1.4 hours of direct labor per chair. Direct labor workers were $7.80 per hour. actually paid Required a. Calculate the total materials cost variance and the materials price and usage variances. What could explain the material price and usage variances? b. Calculate the total labor cost variance and the labor price and usage variances. What could explain the labor price and usage variances