Joe is a purchasing manager, and is negotiating a contract to buy 10,000 units of material from a supplier. Joe knows that to produce the product in house (preliminary cost analysis), he would have to invest $46,000 in equipment and incur a variable cost of $5 per unit. Assuming the total fixed cost to draft a conctract with his supplier is $1000, what is the maximum purchase price that he should negotatie with his supplier? (Break even analysis, make or buy)