A firm plans to begin production of a new small appliance. The manager must decide whether to purchase the motors for the appliance from a vendor for $6.60 each or to produce them in house. There are two in house options.

Option 1 would have an annual fixed cost of $160000 and a variable cost of $5.40.

Option 2 would have an annual fixed cost of $190000 and a variable cost of $4.20.

Calculate the maximum quantity that would have the manager select purchasing the motors from the vendor.