I just need to know how to get the direct labor efficieny variable and direct labor rate variance. i forgot how I did it. please explain throughly haha. Thank you!

During the most recent month, the following activity was recorded: Twenty thousand ounces of material were purchased at a cost of $2.40 per ounce. All of the material was used to produce 2,500 bottles of Whim. Nine hundred hours of direct labor time were recorded at a total labor cost of $10,800. Compute the direct materials quantity and price variances for the month. Compute the direct labor efficiency and rate variances for the month