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Sagot :
[tex]charging \ 350\ \ books\ cost \ 1137,50\$\ profit\\\\\
charging\ 1\ book\ cost\ 1137,50\div350=3,25\$\\\\\
x+3,25-new\ price\\\\
(3,25+x)*350=1500\ \ \ |:350\\
3,25+x=4,28\\
x=4,28-3,25\\
x=1,03\\\\
x+3,25=1,03+3,25=4,28\\\\The\ least\ amount\ thay\ should\ charge\ for\ each\ book\ is\ 4,28\$.[/tex]
we know that
The school paid a unit price ($) per book of
[tex] \frac{1,137.50}{350} =3.25 [/tex]
$[tex] 3.25 [/tex] per book.
In order to make a profit of $1,500, the agenda books need to be
sold for a minimum of
[tex] 3.25+\frac{1500}{350} =3.25+4.29\\ =7.54 [/tex]
$[tex] 7.54 [/tex] per book.
Check
$[tex] 7.54*350 [/tex] brings revenue of
$[tex] 2,639 [/tex],
and [tex] (2,639-1,137.50) [/tex] gives profit of
$[tex] 1,501.50 [/tex]
therefore
the answer is
$[tex] 7.54 [/tex] per book.
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