Grab a scratch pad and write down a 'manifest' before you build something
2 chunks to 1 item (at part builder)
9 ingots to 1 block (at smeltery)
Part costs are measured in items or ingots, so using the above you can figure out
exactly what you need for a given item
(also 9 nuggets = 1 ingot, but you can't seem to melt ingots down, so you craft them normally first)