Database: regional_sales
Question: Calculate ratio between the highest unit cost and the lowest unit cost?
SQL: SELECT ( SELECT REPLACE(`Unit Cost`, ',', '') FROM `Sales Orders` WHERE REPLACE(`Unit Cost`, ',', '') = ( SELECT REPLACE(`Unit Cost`, ',', '') FROM `Sales Orders` ORDER BY REPLACE(`Unit Cost`, ',', '') DESC LIMIT 1 ) ORDER BY REPLACE(`Unit Cost`, ',', '') DESC LIMIT 1 ) / ( SELECT REPLACE(`Unit Cost`, ',', '') FROM `Sales Orders` WHERE REPLACE(`Unit Cost`, ',', '') = ( SELECT REPLACE(`Unit Cost`, ',', '') FROM `Sales Orders` ORDER BY REPLACE(`Unit Cost`, ',', '') ASC LIMIT 1 ) ORDER BY REPLACE(`Unit Cost`, ',', '') ASC LIMIT 1 )