This is the equations,
Tee Company: 9.65x + 43
Shirtz Company: 8.40x + 58
If you were to buy one shirt from each company these would be the prices,
Tee Company: $52.65
Shirtz Company: $66.40
I would recommend the Tee Company since the price per shirt is cheaper.
Well if hes gonna add .25 cents every 6th month then i think you would have to pick D because it shows the starting pay (5.50) then adds the .25 for every 6th month. Hope i helped :)
