Devon invested $10,500 in three different mutual funds. A fund containing large cap stocks made a 6.5% return in 1 yr. A real estate fund lost 11.2% in 1 yr, and a bond fund made 4.9% in 1 yr. The amount invested in the large cap stock fund was four times the amount invested in the real estate fund. If Devon had a net return of $369 across all investments, how much did he invest in each fund?