def test_with_no_stocks():
  total_stocks = 0
  total_cash = 100
  quoted_bid_price = 3000
  NAV = calculate_NAV(total_stocks, total_cash, quoted_bid_price)
  assert NAV == 100
def test_with_both_stock_and_cash():
  total_stocks = 10
  total_cash = 250
  quoted_bid_price = 3000
  NAV = calculate_NAV(total_stocks, total_cash, quoted_bid_price)
  assert NAV == 550
def test_with_float_bid_value():
  total_stocks = 10
  total_cash = 250
  quoted_bid_price = 3250
  NAV = calculate_NAV(total_stocks, total_cash, quoted_bid_price)
  assert NAV == 575