if (CmdSucceeded(ret)) {

			return_value = CommandCost();

			/* We know that the command is valid for at least one vehicle.

			 * If we haven't set DC_EXEC, then there is no point in continueing because it will be valid */

			if (!(flags & DC_EXEC)) break;

		}

	}

	return return_value;

}

/** Sells all vehicles in a depot

 * @param tile Tile of the depot where the depot is

 * @param flags type of operation

 * @param p1 Vehicle type

 * @param p2 unused

 */

CommandCost CmdDepotSellAllVehicles(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)

{

	VehicleList list;

	CommandCost cost(EXPENSES_NEW_VEHICLES);

	VehicleType vehicle_type = (VehicleType)GB(p1, 0, 8);

	/* Get the list of vehicles in the depot */

	BuildDepotVehicleList(vehicle_type, tile, &list, &list);

	for (uint i = 0; i < list.Length(); i++) {

		CommandCost ret = DoCommand(tile, list[i]->index, 1, flags, sell_command);

		if (CmdSucceeded(ret)) cost.AddCost(ret);

	}

	if (cost.GetCost() == 0) return CMD_ERROR; // no vehicles to sell

	return cost;

}

/** Autoreplace all vehicles in the depot

 * Note: this command can make incorrect cost estimations

 * Luckily the final price can only drop, not increase. This is due to the fact that

 * estimation can't predict wagon removal so it presumes worst case which is no income from selling wagons.

 * @param tile Tile of the depot where the vehicles are

 * @param flags type of operation

 * @param p1 Type of vehicle

 * @param p2 If bit 0 is set, then either replace all or nothing (instead of replacing until money runs out)

 */

CommandCost CmdDepotMassAutoReplace(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)

{