Answer: $3142.72
Explanation:
First, it marked down 30% so only have 70% left
So we take 6100 times 0.7 = $ 4270
Second, it marked down 20% so only have 80% left
So we take 4270 times 0.8 = $3416
Mark up 15% so it is 115%
So we take 3416 times 1.15 = $3928.40
Final markdown is 20% so only 80%
So we take 3928.40 times 0.8 = $3142.72