New Englands Productions uses two materials in the production of its product. The materials, X and Y, have the following standards: Material Standard Mix Standard Unit Price Standard Cost 5000 units $2 per unit $10,000 7000 units $3 per unit $21,000 Yield 10800 units During July, the following actual production information was provided: Material Actual Mix 6500 units 6500 units Yield 11100 units A Refer to the Figure above. What is the materials mix variance? $866 (U) $1083 (U) C $1083 (F) $866 (F) B . Refer to the Figure above. What is the materials usage variance? $1667 (F) $639 (U) $639 (F) D $1667 (U)