Annual preferred dividend = 0.07*40*1500 =$4,200
Since there was a one year dividend arrears to preferred stock holders, the total amount that goes to preferred stockholders = 4,200 + 4,200 (arrears of previous years) = 8,400
So common stockholders received = 10,000-8,400 = $1,600 in dividends
So dividend per share for common shareholders =1600/2200 = $0.727/share