The company earns $⁢60 for each gadget and $⁢90 for each widget. At which point is the maximum profit achieved?

Let x be the number of gadgets and y the number of widgets. Profit is 60x + 90y. At (4, 5), profit is $60(4) + $90(5) = $690, which is more than the profits at the other listed points; therefore, the maximum is at (4, 5).

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