In the most recent month, 155,000 products were shipped using 6,000 direct labor-hours. IWI incurred a total of $17,400 in variable overhead costs. According to the corporation's standards, 0.04 direct labor-hours are required to fulfill an order for one product and the variable overhead rate is $3.00 per direct labor-hour Required: 1. What is the standard labor-hours allowed (SH) to ship 155,000 products to customers? 2. What is the standard variable overhead cost allowed (SH SR) to ship 155,000 products to customers? 3. What is the variable overhead spending variance? 4. What is the variable overhead rate variance and the variable overhead efficiency variance? (For requirements 3 and 4, indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (.e., zero variance). Input all amounts as positive values. Do not round intermediate calculations.) 1. Standard quantity of labor-hours allowed 2. Standard variable overhead cost allowed 3. Variable overhead spending variance 4 Variable overhead rate variance Variable overhead efficiency variance