Eco Furniture Ltd$.$ makes wooden furniture. One of their products is a wooden desk. The exterior is made of walnut, a high quality wood, but the interior drawers are made of pine, a less expensive wood. The budgeted direct materials quantities and prices for one desk are:WalnutPineQuantityInput Unit$9$ square metres$3$ square metresRate perCost forOne Desk$$62/$square$$558$metre$$19/$square$$57$metreDuring the month of November $600$ desks were produced. The actual material volume and costs were:WalnutPineTotalTotalQuantity Cost$5,250$ square metres $$336,0002,250$ square metres $$123,750$What is the direct materials mix variance for pine? a$.$ $$7,125$ U b$.$ $$8,650$ FC$.$ $$5,750$ Ud$.$ $$6,500$ U e$.9250$F