Marcus ordered 5 croissants at $3.00 apiece, 4 cinnamon rolls at $2.50 each, 3 mini quiches for $4.00 apiece and 13 blueberry muffins that were $1.00 apiece.  At check out, Marcus shows his loyalty card that gives him 10% off of his purchase.  What is Marcus' total bill?
5 croissants cost $3.00 each so they cost 5*3 = $
<gadget id="calculator">5*3</gadget>
<output>15</output>
15.00
4 cinnamon rolls cost $2.50 each so they cost 4*2.5 =$
<gadget id="calculator">4*2.5</gadget>
<output>10</output>
10.00
3 mini quiches cost $4.00 each so they cost 3*4 = $
<gadget id="calculator">3*4</gadget>
<output>12</output>
12.00
13 blueberry muffins cost $1.00 each so the cost 13*1 = $
<gadget id="calculator">13*1</gadget>
<output>13</output>
13.00.
All total, his pastries costs 15+10+12+13 = $
<gadget id="calculator">15+10+12+13</gadget>
<output>50</output>
50.00.
His has a 10% coupon for his $50.00 purchase so that saves him .10*50 = $
<gadget id="calculator">10*.01*50</gadget>
<output>5</output>
5.00.
His total bill is $50 minus his discount of $5.00 so 50-5 = $
<gadget id="calculator">50-5</gadget>
<output>45</output>
45.00.

<result>45</result>