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Note 5 - Inventories (Tables)
3 Months Ended
Jun. 27, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

June 27, 2020

  

June 29, 2019

  March 31, 2020 
             

Finished products

 $330,071  $405,372  $351,251 

In process

  29,875   33,568   31,173 

Raw materials and supplies

  206,024   219,075   173,474 
   565,970   658,015   555,898 

Less excess of FIFO cost over LIFO cost

  142,126   164,517   144,267 

Total inventories

 $423,844  $493,498  $411,631