Consumption of building resources (Death Stranding)

Hi all. Such a problem. I can’t understand how on some buildings, the number of resources is not a multiple of 10. Example: construction of a highway, resources are needed: chiral crystals, metal, ceramics. If the crystals can be put any number, from 1 unit to the full required. While metal, the minimum can put a pack of 50 units. But when I approach the building, there are already resources in different quantities and not a multiple of 10. The following content. Chiral crystals 1080/1080, metal 2239/3200, ceramics 1679/2400. So the question is, how did the players manage to put these 9 pieces of materials?