Make the biggest number with 12, 1, 4, 7 Numbers can only be used once Can use brackets and all operations except powers and can't put numbers together like 1241

Oscar and julie ashton are celebrating their 15th anniversary by having a reception hall. they have budgeted $4,500 for their reception. if the reception hall charges a $90 cleanup fee plus & 36 per person, find the greatest number of people that they may invite and still stay within their budget.