Finally finished with my band!
Their household funds are: 464 946 (at the end of the 2 weeks) - 6171 (funds at the beginning)= 458 775 $
Multiplier: 1.00 + 147 gold medals x 0.3 + 4 silver medals x 0.2 = 1.00+ 44.1 + 0.8 = 45.9
Total: 458 775 x 45.9 = 21 057 772.5