Consignment

X of Kolkata sends out goods costing Rs 100000 to Y of Mumbai at cost +25%. Consignor's expenses Rs 2000.3/5of the goods were sold by consignee at Rs 85000.commission 2% on sales +20% of gross sales less all commission exceeds invoice value. Amount  of commission will be ?

And for this question  is 3083

Plz explain me this problem...