Michelo, Ltd., produces a toy called the Revo. The company has recently established a standard cost system to help control costs and has established the following standards for the Revo toy:

Direct materials: 7 microns per toy at $0.34 per micron

Direct labor: 1.3 hours per toy at $6.70 per hour

During July, the company produced 4,900 Revo toys. The toy's production data for the month are as follows:

Direct materials: 76,000 microns were purchased at a cost of $0.31 per micron. 33,125 of these microns were still in inventory at the end of the month.

Direct labor: 6,770 direct labor-hours were worked at a cost of $49,421.

Required:

1. Compute the following variances for July: (Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e., zero variance). Input all amounts as positive values. Do not round intermediate calculations. Round final answer to the nearest whole dollar amount.)

a. The materials price and quantity variances.

b. The labor rate and efficiency variances.