Eddies' Bike Shop sells all bikes for $14\mathrm{.}5\%$ below list. In September, the shop cut its prices by an additional $15\%.$ In October, it has an end$-$of$-$season clearance where it cuts prices on all bikes in stock by an additional $25\%.$ Suppose that a bike lists for $$649\mathrm{.}95.$

a$.$ What would the price be for this bike at the end of season clearance?

b$.$ What is the single equivalent discount?