這是不能計算出單價的，這問題在數學上屬於不定方程，理論上有無窮多解，假定鋼筆單價x，鉛筆y，那麼

2776x+3456y＝272224，無法求出x，y的，除非還有其他條件，下面是示例，在鋼筆價格是1--98元之間，鉛筆的價格，如果鋼筆價格不是整數，答案更多了

x y

1 77.96527778

2 77.16203704

3 76.3587963

4 75.55555556

5 74.75231481

6 73.94907407

7 73.14583333

8 72.34259259

9 71.53935185

10 70.73611111

11 69.93287037

12 69.12962963

13 68.32638889

14 67.52314815

15 66.71990741

16 65.91666667

17 65.11342593

18 64.31018519

19 63.50694444

20 62.7037037

21 61.90046296

22 61.09722222

23 60.29398148

24 59.49074074

25 58.6875

26 57.88425926

27 57.08101852

28 56.27777778

29 55.47453704

30 54.6712963

31 53.86805556

32 53.06481481

33 52.26157407

34 51.45833333

35 50.65509259

36 49.85185185

37 49.04861111

38 48.24537037

39 47.44212963

40 46.63888889

41 45.83564815

42 45.03240741

43 44.22916667

44 43.42592593

45 42.62268519

46 41.81944444

47 41.0162037

48 40.21296296

49 39.40972222

50 38.60648148

51 37.80324074

52 37

53 36.19675926

54 35.39351852

55 34.59027778

56 33.78703704

57 32.9837963

58 32.18055556

59 31.37731481

60 30.57407407

61 29.77083333

62 28.96759259

63 28.16435185

64 27.36111111

65 26.55787037

66 25.75462963

67 24.95138889

68 24.14814815

69 23.34490741

70 22.54166667

71 21.73842593

72 20.93518519

73 20.13194444

74 19.3287037

75 18.52546296

76 17.72222222

77 16.91898148

78 16.11574074

79 15.3125

80 14.50925926

81 13.70601852

82 12.90277778

83 12.09953704

84 11.2962963

85 10.49305556

86 9.689814815

87 8.886574074

88 8.083333333

89 7.280092593

90 6.476851852

91 5.673611111

92 4.87037037

93 4.06712963

94 3.263888889

95 2.460648148

96 1.657407407

97 0.854166667

98 0.050925926