[BUG] Input cost exceeding MAX_INT

[lyeyixian]

No description provided.

[codecov-io]

Codecov Report

Merging #243 into master will decrease coverage by 0.04%.
The diff coverage is 33.33%.

@@             Coverage Diff              @@
##             master     #243      +/-   ##
============================================
- Coverage     60.33%   60.29%   -0.05%     
- Complexity      803      805       +2     
============================================
  Files           126      126              
  Lines          2801     2803       +2     
  Branches        361      361              
============================================
  Hits           1690     1690              
- Misses          961      963       +2     
  Partials        150      150              

Impacted Files	Coverage Δ	Complexity Δ
...rc/main/java/seedu/address/model/commons/Cost.java	69.23% <33.33%> (-12.59%)	9.00 <3.00> (+2.00)	⬇️

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[jiaweiteo]

LGTM