I grabbed ChatGPT and asked it to do some basic math for me:
1. Calculate for me the surface area (all four walls, roof and floor) of a typical US trailer park home. It's about 252 m2.
2.) Assuming that the surfaces (all four walls, roof and floor) of the trailer park home are 2.5 cm (1 inch) thick; and the material has a density of 1700 kg/m3 (about the same density as Magnesium)... a medium scout recovery would get you 10,700 kg of alien alloys.
Given that a Medium Scout gets you 11 alien alloys; one unit of alien alloys is about 1000~ kg roughly if we are going by magnesium density.
3.) Doing some rough volume/mass calculations on various items:
0.00388793 kg per 5.56mm bullet @ 11,340 kg/m3 density of lead = 0.00000034 m3 volume
0.00971984 kg per 7.62mm bullet @ 11,340 kg/m3 density of lead = 0.00000086 m3 volume
0.0647989 kg per 14.5mm bullet @ 11,340 kg/m3 density of lead = 0.00000571 m3 volume
For body armor; the typical SAPI plate insert is about 0.001875 m3 in volume.
1 unit (about 1000 kg) of alien alloys (at 1700 kg/m3) would get me:
1.7~ million 5.56mm rounds
686,000 x 7.62mm rounds
100,000 x 14.5mm rounds
150 x Body Armor Plate Sets
So realistically; you shouldn't really have to manufacture "simple" stuff like ammunition and body armor -- even if we go to a fully enclosed suit of body armor -- the surface area of a human is about 2 square meters. At 1700 kg/m3 and 1.5 cm thickness; you're only consuming about 50~ kilograms of alien alloy for a power suit; or about 20 suits per 1 unit (1000 kg) of alien alloy.
Even if there's a lot of "losses" in manufacturing alien alloy stuff to specification; you'd still be able to get plenty of "simple" things per alien alloy.