Timely Transport provides local delivery service for a number of downtown and suburban businesses. Delivery charges are based on distance and weight involved for each delivery: $20$ cents per pound and $15$ cents per mile. Also, there is a $$25$ handling fee per parcel.

a$.$ Develop an expression that summarizes delivery charges. $($Enter your answers as dollar amounts to $2$ decimal places. $($x$1=$ weight, x$2=$ distance$))$

b$.$ Determine the delivery charge for transporting a $35-$pound parcel $15$ miles. $($Do not round your intermediate calculation. Round your answer to $2$ decimal places.$)$