Viper Avionics makes aircraft instrumentation. Its basic navigation radio requires $$90$ in variable costs and $$2000$ 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 $\_\_\_\_\_\_\_\_.$

Group of answer choices

decrease by $$4250$

increase by $$4250$

decrease by $$350$

increase by $$1200$