60. A technology company produced 17 units and 15 units of the same model of testing equipment in locations A and B, respectively, all to be transported to venues $A$ and $B$ of a major sports event, with 18 units going to venue $A$ and 14 units to venue $B$. The transportation costs to venues $A$ and $B$ are as follows:
（1）Assume that $x$ units of equipment are transported from location A to venue $A$. Please fill in the table below and find the function relationship between the total transportation cost $y$ (yuan) and $x$ (units);
（2）When $x$ is $\qquad$, the total transportation cost is minimized, with the minimum value being $\qquad$
Answer: (1) $18-x, 17-x, x-3 ; \quad y=200 x+19300(x \geq 3)$
(2) 3,19900