title: Find combination that gives maximum profit
body: <p>Say I have table that looks like this:</p>
  
  <p>ID | Cost | Profit</p>
  
  <p>1 | 0.55 | 1.24</p>
  
  <p>2 | 0.23 | 3.11</p>
  
  <p>3 | 0.19 | 2.21</p>
  
  <p>4 | 0.53 | 1.49</p>
  
  <p>... and so on.</p>
  
  <p>How do I find the maximum profit if my budget is of certain value? ie: Find max profit with cost of 1.12. If from the table above, I should take item from ID 2  + 3 + 4 to maximize my profit.</p>
  
  <p>I'm trying to google something from LP, Operation Research but I'm really Googling blindly, I don't know what are the keywords I should look for. Please help. </p>