DAHLIA bought Granny Smith and McIntosh apples at the grocery store. The granny Smith apples were $1.35 each. If you bought six find the cost of each Macintosh apple if the cost is $15 and she brought six of each.
If Dahlia bought six Granny Smith apples at $1.35 each, the total cost would be 6 * $1.35 = $<<6*1.35=8.1>>8.1.
If she bought six McIntosh apples at an unknown cost, the total cost would be $15.
Since the total cost of the McIntosh apples is $15 and she bought six, the cost of each apple would be $15 / 6 = $<<15/6=2.5>>2.5 each. Answer: \boxed{2.5}.