Shine Bright Company has three product lines: D, E & F. The following information is available: D: Sales Revenue: $60,000, variable costs 36,000, contribution margin: 24,000, fixed expenses: 120,000, operating income: $12,000 E: Sales Revenue: $38,000, variable costs 18,000, contribution margin: 20,000, fixed expenses: 15,000, operating income: $5,000 F: Sales Revenue: $26,000, variable costs $12,000, contribution margin: 14,000, fixed expenses: 16,000, operating income (loss): $(2,000) Shine Bright Company is thinking of dropping product line F because it is reporting an operating loss. All fixed costs are unavoidable. Assume Shine Bright Company is able to increase the sale price of product F to $30,000 with no change in volume of units siold and no change in variable costs or fixed costs, what affect will this have on operating income? a) increase $2,000; b) increase $4,000; c) decrease $2,000; d) decrease $4,000