An Apple Computer Center sells computers for $1,287.72. Assuming the computers cost $10,512 per dozen.

a.	Find the dollar markup for each computer. (Round your answer to the nearest cent.)

Dollar markup

$

b.	Find the percent markup on cost for each computer.

Percent markup

%

c.	Find the percent markup on selling price for each computer. (Round your answer to the nearest hundredth percent.)

Percent markup

%