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Income Taxes (Tables)
6 Months Ended
Oct. 29, 2017
Income Tax Disclosure [Abstract]  
Summary of Differences in Income Tax Expense at Federal Income Tax Rate and Effective Income Tax Rate
The following schedule summarizes the factors that contribute to the difference between income tax expense at the federal income tax rate and the effective income tax rate reflected in the consolidated financial statements:
 
   
2018
 
2017
Federal income tax rate
   
34.0
%
   
34.0
%
Excess income tax benefits related to stock-based compensation
   
(4.3
)
   
-
 
Tax effects of Chinese foreign exchange (losses) gains
   
(1.5
)
   
1.6
 
U.S. state income tax expense
   
0.4
     
0.6
 
Other
   
0.5
     
1.5
 
     
29.1
%
   
37.7
%