Assume your company has $50K in its cash account. According to the most recent economic forecasts, your best investment opportunity in the market will be returning 4% in the coming 2 years and 2% thereafter.

A young engineer employee proposes, instead, to invest $50K on overhauling the production method which will leave the sales the same but is projected to improve the profit margin from 13% to 14%. What shouls be your "current sales number" for overhauling to be the preferred alternative?