$$\left[ \left( 0.8+\frac{1}{5} \right)\times 24+6.6 \right]\div \frac{9}{14}-7.6$$  $$=\left[ (0.8+0.2)\times 24+6.6 \right]\div \frac{9}{14}-7.6$$  $$=\left[ 1\times 24+6.6 \right]\div \frac{9}{14}-7.6$$  $$=30.6\div \frac{9}{14}-7.6$$  $$=30.6\times \frac{14}{9}-7.6$$  $$=47.6-7.6$$  $$=40$$． 
计算$$\left[ \left( 0.8+\frac{1}{5} \right)\times 24+6.6 \right]\div \frac{9}{14}-7.6=$$（~ ~ ~ ~~）． 
Options:
a: $$30$$ 
b: $$40$$ 
c: $$50$$ 
d: $$60$$ 