4x Suppose the linear cost function C(x)=6x gives the cost for buying xitems. If the items are sold in packages of 10.and no one can buy more than 5 packages, then the RANGE of the function C is A [0,50] B [5,10] C 0,6,12,18,24,30 D (10,20,30,40,50 E { 0,60,120,180,2 II

To find the range of the function $C(x) = 6x$ given the constraints, we need to consider the possible values of $x$ based on the information provided.

Since items are sold in packages of 10 and no one can buy more than 5 packages, the possible values of $x$ are $0, 10, 20, 30,$ and $40$.

Now, let's calculate the corresponding values of $C(x)$ for these values of $x$:

- For $x = 0$: $C(0) = 6 \times 0 = 0$
- For $x = 10$: $C(10) = 6 \times 10 = 60$
- For $x = 20$: $C(20) = 6 \times 20 = 120$
- For $x = 30$: $C(30) = 6 \times 30 = 180$
- For $x = 40$: $C(40) = 6 \times 40 = 240$

Therefore, the range of the function $C(x) = 6x$ given the constraints is $\{0, 60, 120, 180, 240\}$.

So, the correct answer is:
E. $\{0, 60, 120, 180, 240\}$