Do you want to see what I am learning in school? Here you go:
"On January 1, 2007, Abby sold a share of stock A short for a price of 80. On that same date, Ben sold a share of stock B short for a price of P. Both Abby and Ben bought back and returned, to the original owners, their respective shares of stock on December 31, 2007, when the per-share price of stock A was 70, and the per-share stock B was 120. At the end of 2007, just prior to the close of the short position, stock B paid a dividend of 2 per share, while stock A paid no dividend. Both Abby and Ben were subject to a margin requirement of 50%, and interest on the margin accounts was credit an an annual effective rate of 3%. During 2007, Abby's short sale transaction had an annual effect yield rate r(A), and Ben's transaction had an annual effective yield of r(B). The relationship between the two yields was r(B) = -2r(A). Calculate P."
Are you sure you want to argue numbers with me?