Warp Manufacturing Corporation uses a standard cost system to collect costs related to the production of its ski lift chairs. Warp uses machine hours as an overhead base. The variable overhead standards for each chair are 1.2 machine hours at a standard cost of P18 per hour. During the month of September, Warp incurred 34,000 machine hours in the production of 32,000 ski lift chairs. The total variable overhead cost was P649,400. What is Warp's variable overhead spending variance for the month of September? P37,400 unfavorable OP79.200 favorable OP84.040 favorable O P41.800 favorable