A local photocopying store advertises as follows. " We charge 11 cents per copy for 350 copies or less, 7 cents per copy for each copy over 350 but less than 400 , and 4 cents per copy for each copy 400 and above. " Let x be the number of copies ordered and C(x) be the cost of the job (in cents ).

If x≤350, the cost of the copies is C(x)=_______________ cents

If 350<x<400, the cost of the copies is C(x)=________________ cents

If x≥400, the cost of the copies is C(x)=________________ cents