Explanation:
On the books of Shore Co
Cash A/c Dr $111,560
Sales discount A/c $2,240 ($11,2000 x 2%)
To Accounts receivable A/c $113,800 ($112,000 + $1,800)
(Being cash is received)
On the books of Blue star
Accounts payable A/c Dr $113,800 ($112,000 + $1,800)
To Merchandise inventory A/c $2,240 ($11,2000 x 2%)
To Cash A/c $111,560
(Being cash is paid)