Question 543015
Find the equation for {{{P}}} = profit
and find {{{P=0}}}, the break even point
Let {{{t}}} = number of T-shirts sold
{{{ P = 1099t - ( 28000 + 399t ) }}} ( in cents )
Set {{{ P=0 }}}
{{{ 0 = 1099t - ( 28000 + 399t ) }}} 
{{{ 1099t = 28000 + 399t }}}
{{{ 1099t - 399t = 28000 }}}
{{{ 700t = 28000 }}}
{{{ t = 40 }}}
They must sell 40 T-shirts to break even