16 ounces = 1 pound
so 11 pound 5 ounce package weights 16*11 = 176+5 = 181 ounces
packaging weighs 1 pound 15 ounces = 1*16 = 16+15 = 31 ounces
181-31 = 150 ounces
150/16 = 9.375 pounds = 9 pounds 6 ounces
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