Mike and perry run a art company. They work together to make and paint custom pieces. Mike charges a $100 flat fee for each art piece he makes, plus $420 for each hour he spends making.
Perry charges a $150 flat fee for each painting he paints, plus $390 for each hour he spends painting.

a) Represent what mike charges for one art piece

b) Represent what Perry charges for one painting

c) Write a new simplified expression that represents their total charges, together, for one art piece.

d) Use your answer from part c) to calculate the total cost of a dresser if mike spends 7 hours on drawing it and Perry spends 4 hours on painting it.