Gig multiples and 24 hours turnaround price problem

[samsher_design]

hello, I have a gig where I create infographics.

there I’ve set 5$ for 24 hours turnaround time for 1x graphics. but when someone orders multiple graphics 5x graphics they can select 24 hours turnaround time for all 5 for only 5$.

now my question is how can I make it work when someone orders 5x graphics then they have to pay 5x amoung. 5$ for each one?

for example, check the image

I have 5x order for just 5$. I want it to be 5x order 25$