1. Abacus has 800 obsolete calculators that are carried in inventory at a cost of $1,920. If these calculators are upgraded at a cost of $3,100, they could be sold for $4,500. Alternatively, the calculators could be sold "as is" for $1,600. What is the net advantage or disadvantage of reworking the calculators?
2. Duradyne, Inc. has total costs of $18,000 when 2,000 units are produced and $26,000 when 5,200 units are produced. During March, 4,000 units were produced and sold for $8 each. If the high-low method is used, how much is the variable cost per unit?
3. Ranger Pressure Cleaners has total monthly costs of $5,800 when 3,200 units are produced and $6,425 when 3,700 units are produced. If the high-low method is used, how much is the estimated total monthly fixed cost?