Problem $9$

Not long ago, Ed Sheeran bought $450$ shares of Division Signs Inc. at $$46\mathrm{.}43$ per share; he bought the stock on margin of $61\%.$ The stock is now trading at $$61\mathrm{.}29$ per share, and the Federal Reserve has recently lowered initial margin requirements to $54\%.$ Ed now wants to do a little pyramiding and buy another $400$ shares of the stock What is the minimum amount of equity that he'll have to put up in this transaction?

The minimum amount of equity that he'll have to put up in this transaction is $