A company collected the following data on the number of units produced and total production costs for the last six months:

• Month 1: 1,000 units, $10,000
• Month 2: 1,200 units, $11,500
• Month 3: 1,500 units, $13,000
• Month 4: 800 units, $9,000
• Month 5: 1,600 units, $14,500
• Month 6: 1,300 units, $12,500

Using the high-low method, estimate the variable cost per unit and the total fixed costs.