Question 1010893
If they only sod {{{ x }}} copies, their profit
would be:
{{{ P = 59x - 18x - 6000 }}}
{{{ P = 41x - 6000 }}}
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But they actually sold {{{ x + 2500 }}} copies,
so their profit was:
{{{ P = 41*( x + 2500 ) - 6000 }}}
{{{ P = 41x + 102500 - 6000 }}}
{{{ P = 41x + 96500 }}}