| Revenue | 4/30/2019 | 4/30/2018 | 4/30/2017 | 4/30/2016 |
| Total Revenue | 3,094,881 | 3,159,931 | 3,036,314 | 3,038,153 |
| Cost of Revenue | 1,756,922 | 1,739,729 | 1,644,377 | 1,685,552 |
| Gross Profit | 1,337,959 | 1,420,202 | 1,391,937 | 1,352,601 |
| Operating Expenses |
| Research Development | - | - | - | - |
| Selling General and Administrative | 722,167 | 668,152 | 675,953 | 719,409 |
| Non Recurring | - | - | - | - |
| Others | - | - | - | - |
| Total Operating Expenses | 2,479,089 | 2,407,881 | 2,320,330 | 2,404,961 |
| Operating Income or Loss | 615,792 | 752,050 | 715,984 | 633,192 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | -70,632 | -90,718 | -86,697 | -63,713 |
| Earnings Before Interest and Taxes | 615,792 | 752,050 | 715,984 | 633,192 |
| Interest Expense | -87,051 | -89,372 | -92,951 | -68,962 |
| Income Before Tax | 545,160 | 668,732 | 629,287 | 569,479 |
| Income Tax Expense | 99,904 | 41,823 | 208,370 | 185,926 |
| Minority Interest | - | - | - | - |
| Net Income From Continuing Ops | 445,256 | 626,909 | 420,917 | 383,553 |
| Non-recurring Events |
| Discontinued Operations | -22,747 | -13,760 | -11,972 | -9,286 |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | 422,509 | 613,149 | 408,945 | 374,267 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | 421,469 | 611,657 | 407,940 | 373,549 |