Answer:
 Incremental income is $34,220.00 
Step-by-step explanation:
 Amount in $ 
Number of defective units (a) 2,900.00 
Cost of production per unit (b) 14.90 
Total cost of production (c = a x b) 43,210.00 
Proceed from sale of defective product per unit (d) 5.90 
Sale of defective product (e = d x a) 17,110.00 
Additional cost for correction of defect (f) 5.10 
Cost for correction of defect (g = f x a) 14,790.00 
Selling price per unit after correction of defect (h) 22.80 
Sales after correction of defect (i = h x a) 66,120.00 
Incremental Income from sale (j = i - g - e)  34,220.00