Given

Price Parcels and Packages TR MR TC MC MR-MC PROFIT

100 50 5000 / 1600 / / 3400

90 120 10800 83 2300 10 73 8500

80 190 15200 63 3000 10 53 12200

70 260 18200 43 3700 10 33 14500

60 330 19800 23 4400 10 13 15400

50 400 20000 3 5100 10 -7 14900

40 470 18800 -17 5800 10 -27 13000

30 540 16200 -37 6500 10 -47 9700

20 610 12200 -57 7200 10 -67 5000

10 680 6800 -77 7900 10 -87 -1100

Should the delivery service charge one price or will segmentation increase profits? Support your conclusion.