Question 1074195
[ cost ] = [ cost/ounce ] x [ ounces ]
{{{ 70*4 = 280 }}}
{{{ 30*15 = 450 }}}
{{{ 280 + 450 = 730 }}}
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The selling price is $730
{{{ 730/( 70 + 30 ) = 730/100 }}}
{{{ 730/100 = 7.3 }}}
The selling price per ounce is $7.30