When McDonald’s Corp. reduced the price of its Big Mac by 75 percent.

When McDonald’s Corp. reduced the price of its Big Mac by 75
percent if customers also purchased french fries and a soft drink, The Wall
Street Journal reported that the company was hoping the novel promotion would
revive its U. S. sales growth. It didn’t. Within two weeks sales had fallen.
Using your knowledge of game theory, what do you think disrupted McDonald’s
plans?