Viper Avionics makes aircraft instrumentation. Its basic navigation radio requires$$ $$80$ in variable costs and$$ $$2,000$ per month in fixed costs. Further processing the$$ radio, to enhance its$$ functionality, will require an additional$$ $$25$ per unit of variable$$ costs, plus an increase in fixed costs of$$ $$800$ per month. The marketing manager believes that they would be able to increase the sales price of the radio from$$ $$260$ to$$ $$300.$ Viper sells $30$ radios per month. If Viper decides to further process the$$ radio, monthly operating income would$\_\_\_\_\_\_\_\_.$

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Part $1$

A$.$

increase by$$ $$3,950$

B$.$

decrease by$$ $$350$

C$.$

decrease by$$ $$3,950$

D$.$

increase by$$ $$1,200$