From the meaning of the question: 30x+20(x+6)= 1070,
Solution: x= 19,
Then x+6=25,
Answer: The unit price of pen is 19 yuan, and the unit price of brush is 25 yuan.
(2) (1) We set Y pen with unit price of 19 yuan, and then (60-y) brush the pen with unit price of 25 yuan.
According to the meaning of the question:19y+25 (60-y) =1322,
Solution: y=893,
It doesn't matter, that is, Mr. Wang must be mistaken;
② Set Z pen, unit price 19 yuan, unit price of signature pen is one yuan.
According to the meaning of the question:19z+25 (60-a) =1322-a, that is, 6z= 178+a,
Since a and z are integers, and 178+a should be divisible by 6,
The empirical calculation shows that when a=2, 6z= 180, that is, z=30, which is consistent with the meaning of the question;
When a=8, 6z= 186, that is, z=3 1, which is consistent with the meaning of the question.
The unit price of pens is 2 yuan or 8 yuan.
So the answer is: 2 or 8.