Hi greenjoy,
Gross Development profit is: (for example)
Total Development Cost (TDC) = $3,000,000
Total Development revenue (TDR) = $3,650,000
Gross Development Profit = TDR - TDC , (3.65m - 3m)
Gross Profit = 650k
Gross Profit Margin is then,
Gross Profit over TDC...