STANDARD COSTING - 8 points Bulong Company manufactured 1,000 units of a special multi-layer breathable fabric with the trade name "walang pakpak". The following information from the "walang pakpak" production department for the month of May is as follows: Direct material purchased: 36,000 yards at 1.38 per yard Direct material used: 19,000 yards at 1.38 per yard 49,680 26,220 38,430 Direct labor: 4,200 hours at 9.15 per hour The standard prime costs of one unit of "walang pakpak" is as follows: Direct material: 20 yards at 1.35 per yard Direct material used: 4 hours at 9.00 per yard Total standard prime cost per unit of output Required: 1. Materials spending variance 2. Direct material efficiency variance 3. Labor rate variance 4. Labor efficiency variance 23 27 36 63