My solution:
Quantity A = (-4)*(-3)**(-2) (* -1) = 24
Quantity B = 1 x 2 x 3 x 4 = 24 (Correct answer here would be 0 x 1 x 2 x 3 = 0, but I do not understand why zero was included here, since it is neither positive nor negative number).
For future reference, does non-negative always include zero?