Hamburgers cost $2 per lbs and chicken costs $3 lbs and you only have $30 to spend and expect at least 3lbs of hamburger
if you want at least 3 pounds of hamburgers, then $6 is enough to buy those 3 pounds of hamburgers. if you only buy 3 pounds, then you also have enough for 4 pounds of chicken. $3 a pound x 4 = $12. you have 2 dollars left to spare, which means you can buy another pound of hamburgers. so 4 pounds each are able to be purchased.
what table? be more specific