O'Shea Company manufactures ceramic vases. It uses its standard-costing system when developing its flexible-budget amounts. In April 2020, 1,950 finished units were produced. The following information is related to its two direct manufacturing cost categories of direct materials and direct manufacturing labor. Direct materials used were 4,400 pounds. The standard direct materials input allowed for one output unit is 2 pounds at $15 per pound. 6,000 pounds of materials were purchased at $16.50 per pound, a total of $98,000. Actual direct manufacturing labor-hours were 3,250 at a total cost of $66,300. Standard manufacturing labor time allowed is 1.5 hours per output unit, and the standard direct manufacturing labor cost is $20 per hour. Required: (1) Determine the Material Price & Quantity Variance. (2) Determine the Labor Rate & Efficiency Variance. (3) In general, as a manager what do you do as to a variance? Specifically, as to the above variances, what are the possible causes of the variances