Preston has a sandwich shop. He charges $5 for each sandwich. He also charges $20 for a delivery fee. Abra Company orders 18 sandwiches from Preston and also tips him 10%. How much total, in dollars, did Preston receive?
First, find the price of the sandwiches $5 per sandwich * 18 sandwiches = $
<gadget id="calculator">5*18</gadget>
<output>90</output>
90.
Now add in the delivery fee $90 + $20 = $
<gadget id="calculator">90+20</gadget>
<output>110</output>
110.
Now the tip $110 * 0.10 = $
<gadget id="calculator">110*0.10</gadget>
<output>11</output>
11.
Add the tip to the price of the sandwiches $110 + $11 = $
<gadget id="calculator">110+11</gadget>
<output>121</output>
121 in total.

<result>121</result>