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Note 4 - Inventories (Tables)
6 Months Ended
Sep. 30, 2023
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
      

As of:

     
  

September 30,

  

October 1,

  

March 31,

 
  

2023

  

2022

  

2023

 

Finished products

 $988,307  $805,500   613,622 

In process

  87,463   47,050   75,123 

Raw materials and supplies

  247,733   181,680   284,593 
   1,323,503   1,034,230   973,338 

Less excess of FIFO cost over LIFO cost

  310,056   219,264   302,440 

Total inventories

 $1,013,447  $814,966  $670,898