Given QM output on a product-mix problem as below:

Objective: Maximize

Results ----------

X1 X2 RHS Dual

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Maximize 40 50

Material A 1 2 <= 40 16

Material B 4 3 <= 120 6

Material C 2 7 <= 300 0

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Solution 24 8 1,360

The current dual value (or shadow price) of Material A is 16. If we keep increasing the availability of Material A (which is currently 40) while maintain the others unchanged, then its dual value would ________________ .

		always remain 16
		become 0 at some point
		keep getting larger and larger
		become less than 16 but never come to 0
		become negative at some point