Hii teacher please provide for General accounting question answer do fast

AquaTex Corp. incurs a cost of $18 per unit to produce Item X, which sells for $32 per unit. The company can further process Item X to produce Item Y. Item Y would sell for $38 per unit and would require an additional cost of $10 per unit to be produced. What is the differential cost of producing Item Y? a) $18 per unit b) $10 per unit c) $28 per unit d) $38 per unit