Angelone Manufacturing Limited produces parts for airplanes. Their main product offerings are airplane seats and airplane doors. Last year they sold 300 airplane seats and 700 airplane doors. Below is the sale and cost info: Item Airplane seat Airplane door Selling price $3,500 $5,250 Variable costs $1,250 $2,750 Total fixed costs incurred for production was $3,000,000. Assuming they want to maintain the current sales mix calculate the total number of units that must be sold of both products combined to break even. (round to the next whole unit)