1. remain the same
2. decrease by $7 per unit
3. increase by $27 per unit
4. increase by $77 per unit

Starforce Avionics makes aircraft instrumentation. Its basic navigation radio requires SEO in variable costs and $4,000 per month in fixed costs. Further processing the radio, to enhance its functionality, will require an additional $27 per unit of variable costs but no change to the fixed costs. The marketing manager believes that the company would be able to increase the sales price from $280 to $300. If Starforce decides to further process the product, operating income would