Prado Corporation manufactures and sells a single product. The company uses a standard cost system. The standard cost per unit of product follows:

Materials - 1 lb plastic@$3.00 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 3.00
Direct labor- 1.6 hr@$10.00 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.00
Factory overhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.45
Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .$23.45
The charges to the manufacturing department for November,
when 5,000 units were produced, follow:
Materials - 5,300 lb @$3.00 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $15,900
Direct labor - 8,200 hr@$9.80 . . . . . . . . . . . . . . . . . . . . . . . . . .80,360
Factory overhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23,815
Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $120,075
The purchasing department normally buys about the same quantity as is used in production during a month. In November, 5,500 pounds were purchased at a price of $2.90 per pound.

Required:
Calculate the following variances from standard costs for the data given,
1. Materials quantity.
2. Materials purchase price (at time of purchase).
3. Labor efficiency.
4. Labor rate.