Dahlia bought Granny Smith and Macintosh apples at the grocery store. The Granny Smith apples were $1.35 each if you bought 6. Find the cost of each Macintosh apple if the total cost is $15 and she bought 6 of each.
The total cost of the Granny Smith apples is 6* $1.35 = $<<6*1.35=8.10>>8.10
The cost of the Macintosh apples is $15 - $8.10 = $<<15-8.10=6.90>>6.90
The cost of each McIntosh apple is $6.90/6 = $<<6.90/6=1.15>>1.15. Answer: \boxed{1.15}.