While using COBOL mainframe, I can't figure out how to calculate the commission using If/else....End If statement

COMMISSION CALCULATION Table* Quarterly Sales $ O or less $0.01 - $2,499.99 $2,500.00 - $4,999.99 $5,000.00 - $9,999.99 $10,000.00 $19,999.99 $20,000.00 - $29,999.99 $30,000.00 - $39,999.9 $40,000.00 - $49,999.99 $50,000.00 - $74,999.99 $75,000.00 - $99,999.99 $100,000 or more Base Commission $0 $50 $75 S100 $200 $250 $300 $350 $500 $750 $1,000 Bonus Commission 0% of sales 0% of sales 4.0% of sales 4.5% of sales 5.0% of sales 5.5% of sales 6.0% of sales 6.5% of sales 7.0% of sales 7.5% of sales 10% of sales *Note: You can use IF/ELSE....END-IF or EVALUATEWHEN/END-EVALUATE (Ch5) commands. Later in the semester, you will learn how to use COBOL Tables and subscripts. If you want to, you can look ahead in the book to learn/use this technique