A sports store sells cans of tennis balls in different colors. Each can of tennis balls, in any color, costs $2.59. Amanda buys cans of pink, green, and
blue tennis balls. Which expression below represents the total cost of the
cans of tennis balls if p represents the number of cans of pink tennis balls,
g represents the number of cans of green tennis balls, and b represents
the number of cans of blue tennis balls?