Catherine paid $118.72 for an MP3 player. If the price paid includes a 6% sales tax, which of the following equations can be used to determine the price of the MP3 player before tax? (Let x represent the cost of the MP3 player and y represent the total cost after tax.) A. y = x + 6x B. y = 1.6x C. y = 0.94x D. y = 1.06x