optimal combination

Income

monthly salary

year-end bonus

Suggested method

Basic-level

2945

33,948

64,867

Middle-level

9336

54,000

153,903

High-level

22,219

107,981

324,083

Fu’s method

Basic-level

5167

18,000

78,724

Middle-level

12,167

54,000

180,569

High-level

31,333

54,000

353,261