Question 103143
{{{1}}}{{{ pt}}} {{{9}}}{{{ fl}}}{{{oz }}}  
+ {{{2}}}{{{ pt}}} {{{10}}}{{{ fl}}}{{{ oz}}} 
= {{{3 }}}{{{pt }}}{{{19}}}{{{ fl }}}{{{oz}}}

Since {{{1}}}{{{ pt}}} = {{{16}}}{{{ fl}}}{{{ oz }}}  
	{{{3 }}}{{{pt * 16}}}= {{{48}}}{{{ fl}}}{{{ oz }}}

So, Mark have used {{{48}}}{{{ fl}}}{{{ oz}}}  in all.
Since {{{1}}}{{{ qt }}}= {{{32}}}{{{ fl }}}{{{oz}}}, a container of film developer holds 
{{{3 *32}}}{{{ fl }}}{{{oz}}} which is {{{96}}}{{{ fl }}}{{{oz}}}.

The difference between {{{96}}}{{{ fl}}}{{{ oz}}} and {{{48}}}{{{ fl }}}{{{oz}}}  will give us remains which is 
{{{48}}}{{{ fl }}}{{{oz}}}= {{{1}}}{{{ gl }}}{{{16}}}{{{ oz }}}
= {{{1}}}{{{ gl}}}{{{ 1}}}{{{ pt}}} .