Решение
Варианты расходов:
=
=
=
Ответ
200
![S[ ] = `*`(900, .25)](im/m_352.gif){kind=small}
= ![S[ ] = 225.00](im/m_353.gif){kind=small}
![S[] = `+`(130, `*`(.2, `*`(`+`(900, -320))))](im/m_354.gif){kind=small}
= ![S[] = 246.0](im/m_355.gif){kind=small}
![S[] = 200](im/m_356.gif){kind=small}
= ![S[] = 200](im/m_357.gif){kind=small}
Ответ = = = Ответ