# Why $\gamma(c,i)=cv(i)$ means diseconomies of scale?

Let's define the transaction cost of credit consumption as $$\gamma(c,i)$$ where $$c$$ is consumption and $$i$$ is a fraction of credit purchase.
If the transaction technology does not exhibit economies of scale,
it can be expressed with some function $$v(\bullet)$$ as: $$\gamma(c,i)=cv(i)$$
It means per unit cost of transating goods is independent of the volume transacted.
But in this equation $$c$$ is left so I wonder how can we say that "it is independent of the volume transacted".

Can anyone tell me the reason?

It means per unit cost of transating goods is independent of the volume transacted.\ But in this equation $$c$$ is left so I wonder how can we say that "it is independent of the volume transacted".
Therefore, it is the per unit cost that is independent of $$c$$, not the total cost $$\gamma(c,i)=cv(i)$$, which of course depends on $$c$$.
The per unit cost is: $$\frac{\gamma(c,i)}{c}=v(i)$$
that is evidently independent of $$c$$, as $$v(i)$$ is independent of $$c$$.