Can you give me some step-by-step instructions for this math problem: Sasha notices that prices for lumber have gone up 50% in the last few months after she bought some lumber. Since she has leftovers, she decides to sell them. She has leftover ten 2 x 4 x 10 boards that cost her $10 each. She also has five 4 x 4 x 10 boards she bought for $16 each. If she sells them all, how much profit does she make?