From November to December of 2015, the price per share of BP Oil dropped from $98.25 to $63.75. Exxon shares also dropped from $98.75 to $55.25. In November, your rich cousin invested $56,913.75 into a combination of BP and Exxon shares. By December they sold their shares for $36,452.25 losing $20,461.5 from their investment. How many of each stock did they purchase? They purchased Number BP shares and Number Exxon shares.