Question 689520
Let {{{ s = 38000 }}}
Let {{{ r = 2000 }}}
Let {{{ S }}} = total salary
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The first year is {{{ S = s + r*0 }}}
The second year is {{{ S = s + r*1 }}}
The third year is {{{ S = s +  r*2 }}}
Adding up the salary for years 1 through 10
{{{ S = 10s + r*( 0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 ) }}}
(1) {{{ S = 10s + r*(1/2)*(9*10) }}}
and
{{{ S = 10*38000 + 2000*(1/2)*(9*10) }}}
{{{ S = 380000 + 90000 }}}
{{{ S = 470000 }}}
The total salary over a ten year period is $470,000
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Formula (1) seems to work
The total salary over a thousand year period would be:
(1) {{{ S = 1000s + r*(1/2)*( 999*1000 ) }}}