Is the answer c? What calculation did you use?

2. FoltIndustries in 2017: It sold $1000 in sweaters. It imported $200 in wool, and purchased $250 in wool from domestic suppliers. It purchased a sewing machine for $300, which depreciated by $25 during the year. It paid $600 in wages. What was FoltIndustries value added in 2017? a) $550. b) $400. c) $250. d) $275. $225