Department 3 Has 2500 Hours

Multiple Choice

Department 3 has 2500 hours.Transfers are allowed to departments 2 and 4,and from departments 1 and 2.If A_i measures the labor hours allocated to department i and T_ij the hours transferred from department i to department j,then ​

A) T₁₃ + T₂₃ − T₃₂ − T₃₄ − A₃ = 2500.
B) T₃₁ + T₃₂ − T₂₃ − T₄₃ + A₃ = 2500.
C) A₃ + T₁₃ + T₂₃ − T₃₂ − T₃₄ = 2500.
D) A₃ − T₁₃ − T₂₃ + T₃₂ + T₃₄ = 2500.