A segmented contribution margin statement for Cleen Inc. for November 2022 is presented below. Additional information regarding Cleen Inc.'s operations follows the statement. Each store's direct fixed costs would be eliminated if either store were closed and the closed store's common fixed costs would be allocated to the store that remained open. Cleen inc, allocates common fixed costs to each store equally. Management estimates that closing the Zambra Store would result in a 10% decrease in Victoria Store sales, while closing the Victoria Store would not affected Zambra Store sales. Each store's direct fixed costs would be eliminated if either store were closed and the closed store's common fixed costs would be allocated to the store that remained open. Cleen Inc. allocates common fixed costs to each store equally. Management estimates that closing the Zambra Store would result in a 10% decrease in Victoria Store sales, while closing the Victoria Store would not affected Zambra Store sales. De not enter dollar signs or commas in the input boxes. Only use the negative sign for a decrease in operating income. a) What is the change in total operating income if Cleen Inc. decides to close the Zambra Store? b) Cleen Inc is considering a promotional campaign at the Zambra Store that would not affect the Victona Store. The extra promotional cost of $3,600 is expected to increase sales by 12%. What is the change in operating income? b) Cleen Inc. is considering a promotional campaign at the Zambra Store that would not affect the Victoria Store. The extra promotional cost of $3,600 is expected to increase sales by 12%. What is the change in operating income