Question 510063
Call the list price {{{p}}}
Given: {{{  p = 800 }}}
I think the equation would be:
{{{ ( p - .2p)*( 1 - .1 ) *( 1 + .06 ) + 40 }}}
{{{ p*.8*.9*1.06 + 40 }}}
cost of machine = {{{ .7632p + 40 }}}
Just plug in {{{ p = 800 }}} to solve