Worked example
Four bids: 40,000 · 25,000 · 15,000 · 10,000. Round 1 closes and the 10,000 drops: 300 goes to the pot, 9,700 splits three ways, 3,233 to each bid still in.
Round 2: the 15,000 drops, 7,275 to each of the last two, 450 to the pot. Round 3: the 25,000 drops and the 40,000 is paid 24,250.
The 40,000 is the last bid: it takes its 40,000 back, the 1,500 pot and 34,758 in splits. The 25,000 still walks with 10,508; the 15,000 with 3,233.