Shipping = Base Price + Per Product?

Sorry, I'm sure this has already been asked but I couldn't find it in the forums. I'm setting up a website that sells a specific light bulb, we need the shipping to be $3.50 base cost and then $.50 per bulb there after, is there a what to achieve this? It's common for people to purchase for example 5 bulbs, we'd like to have the $3.50 base and then $.50 for each of those 5 bulbs making the total cost $6.00. Or another idea how to achieve this?

Thank you!

You need to set the same weight (1kg for example) for all your bulbs and create several manual shipping methods:
from 0 to 1.5kg => $3.50
from 1.5kg to 2.5kg => $4
from 2.5 to 3.5kg => $4.50
...etc...
The correct shipping method will be displayed based on the weight of the order (ie the number of products).

Makes sense, thanks!