Tyler baked 702 cookies. he sold them in boxes of 18. after selling all the boxes of cookies for the same amount each, he earned 136.50. what was the coat of one box of cookie

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.