Southern goods to analyzing a proposed project using standard sensitive analysis the company expects to sell $4500$ units plus $-11\%$ the expected variable cost per unit is $$13$ and the expected fix cost for $12,000$ cost assessments are considered accurate with a $-5\%$ range depreciation expense is $5000.$ The sale price is estimated at $$22$ a unit plus $-2\%$ the company conducts a sensitivity analysis using a variable cost of $$12.$ What would the cost variable cost estimate fee?