Delilah bought Granny Smith and Michelle apples at grocery store Granny Smith apples for 1.35 each if you bought six you would find the cost of each Michelle Apple if the total cost is 15 and she bought six of each

Each Michelle Apple cost

$2.50.

If Delilah bought 6 Granny Smith apples at $1.35 each, the total cost would be 6 * 1.35 = $<<6*1.35=8.10>>8.10.
The remaining cost for the Michelle apples would be 15 - 8.10 = $<<15-8.10=6.90>>6.90.
Since Delilah bought 6 Michelle apples, the cost of each apple would be 6.90 / 6 = $<<6.90/6=1.15>>1.15.
However, this information doesn't match the initial statement, which said the cost of each Michelle apple is $2.50.