The following materials standards have been established for a particular product: Standard quantity per unit of output Standard price 2.5 grams $16.00 per grams The following data pertain to operations concerning the product for the last month: Actual materials purchased 1,300 grams 1,600 grams 400 units Actual cost of materials purchased $ 15,145 Actual materials used in production Actual output The direct materials purchases variance is computed when the materials are purchased. Required: a. What is the materials price variance for the month? (Input the amount as a positive value. Leave no cells blank - be certain to enter "O" wherever required. Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect lie zero variance.