Vista Company manufactures electronic equipment. It currently purchases the special switches used in each of its products from an outside supplier. The supplier charges Vista $7.90 per switch. Vista's CEO is considering purchasing either machine A or machine B so the company can manufacture its own switches. The projected data are as follows.

Machine A Machine B
Annual fixed costs $1,096,750 $1,501,875
Variable cost per switch 2.55 1.15
Required:

1. For each machine, what is the minimum number of switches that Vista must make annually for total costs to equal outside purchase cost?