Help please with explanations

The Rhythm Shop is a large retailer of acoustic, electric, and bass guitars. An income statement for the company's acoustic guitar department for a recent quarter is presented below: THE RHYTHM SHOP Income Statement-Acoustic Guitar Department For the Quarter Ended March 31 Sales Cost of goods sold 52,610,000 1,160,000 1,450,000 Gross margin Selling and administrative expenses Selling expenses Administrative expenses $ 490,000 990,000 2.000 Operating income 670,000 The guitars sell, on average for $900 each. The department's variable selling expenses are $84 per guitar sold. The remaining seling expenses are fixed. The administrative expenses are 30% variable and 70% fixed. The company purchases its guitars from several suppliers at an average cost of $400 per guitar Required: 1. Prepare an income statement for the quarter using the contribution approach THE RHYTHM SHOP Income Statement-Acoustic Guitar Department For the Quarter Ended March 31 Variable expenses Vanable expenses 0 0 Fixed expenses 0 $ 0 2. What was the contribution toward fixed expenses and profits from each gultat sold during the quarter? (State this figure in a single dollar amount per guitar.) Contribution margin pet guitar 3. If The Rhythm Shop sells 190 more guitars in the quarter ending June 30 than it did in the quarter ending March 31, and fixed costs remain the same, by how much will operating income increase? Operating incomo increase by