Question 983654
I will assume that the $800 has had taxes
taken out already
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Let {{{ s }}} = his MONTHLY salary
If 1/4 of his ANNUAL salary is added on
as an assignment bonus, then 1/4 of
his MONTHLY salary is also added on.
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{{{ s + (1/4)*s }}} = monthly salary +
the monthly bonus
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{{{ s + (1/4)*s - (1/3)*( s + (1/4)*s ) = (2/3)*(  s + (1/4)*s ) }}}
Now I can say:
{{{ ( 2/3 )*( 5/4)*s = 800 }}}
{{{ ( 10/12 )*s = 800 }}}
{{{ ( 5/6)*s = 800 }}}
{{{ s = ( 6/5 )*800 }}}
{{{ s = 960 }}}
This is his monthly salary with out bonus
His Annual salary without bonus is:
{{{ 12*960 = 11520 }}}
$11,520
Hope I got it