Mason is a caterer packing up silverware and plates for a big corporate event. Each piece of silverware weighs 4 ounces, and there are three pieces of silverware per setting. Each plate weighs 12 ounces, and there are two plates per setting. If Mason needs enough settings for 15 tables with 8 settings each, plus 20 backup settings in case of breakage, how many ounces will all the settings weigh?
First find the total weight of the silverware per setting: 4 ounces/piece * 3 pieces/setting = 
<gadget id="calculator">4*3</gadget>
<output>12</output>
12 ounces/setting.
Then find the total weight of the plates per setting: 12 ounces/plate * 2 plates/setting = 
<gadget id="calculator">12*2</gadget>
<output>24</output>
24 ounces/setting.
Then add those two amounts to find the total weight per setting: 12 ounces/setting + 24 ounces/setting = 
<gadget id="calculator">12+24</gadget>
<output>36</output>
36 ounces/setting.
Then multiply the number of tables by the number of settings per table to find the number of table settings: 15 tables * 8 settings/table = 
<gadget id="calculator">15*8</gadget>
<output>120</output>
120 settings.
Then add the 20 backup settings to find the total number of settings: 120 settings + 20 settings = 
<gadget id="calculator">120+20</gadget>
<output>140</output>
140 settings.
Then multiply the total number of settings by the weight per setting to find the total weight: 140 settings * 36 ounces/setting = 
<gadget id="calculator">140*36</gadget>
<output>5_040</output>
5040 ounces.

<result>5_040</result>