The base price of powder per 500 grams is 43.20 USD / 48.08 British pound. Up to the quantity of 8 kg, we calculate double the quantity at a price times 1.6. For quantities above 8 kg, double the quantity cost 1.8 times the price. Thus, the levels at which discounts become effective are: 1 kg, 2 kg, 4 kg, 8 kg, 16 kg, 32 kg, and so on.
1 kg - 43.20 x 1.6 = 69.12 USD / 44.93 British pound
**********
2 kg - 69.12 x 1.6 = 110.59 USD / 71.88 British pound
110.59 USD / 2 = 55.30 per kg
**********
4 kg - 110.59 x 1.6 = 176.94 USD / 115.01 British pound
176.94 USD / 4 = 44.24 per kg
**********
8 kg - 176.94 x 1.6 = 283.10 USD / 184.02 British pound
283.10 USD / 8 = 35.39 per kg
**********
16 kg - 283.10 x 1.8 = 509.58 USD / 331.23 British pound
509.58 USD / 16 = 31.84 per kg
**********
32 kg - 509.58 x 1.8 = 917.24 USD / 596.21 British pound
917.24 USD / 32 = 28.66 per kg
**********
64 kg - 917.24 x 1.8 = 1,651.04 USD / 1,073.18 British pound
1651.04 USD / 64 = 25.80 per kg
**********
128 kg - 1651 x 1.8 = 2,971.81 USD / 1,931.68 British pound
2971.81 USD / 128 = 23.22 per kg
**********
256 kg - 2971.80 x 1.8 = 5349.25 USD / 3,477.01 British pound
5349.25 USD / 256 = 20.89 per kg
**********
512 kg - 5349.25 x 1.8 = 9,628.65 USD / 6,258.62 British pound
9628.65 USD / 512 = 18.80 per kg
**********
1024 kg - 9628.65 x 1.8 = 17,331.57 USD / 11,265.52 British pound
17331.57 USD / 1024 = 16.93 per kg
**********
2048 kg - 17,331.57 x 1.8 = 31,196.83 USD / 20,277.94 British pound
31196.83 USD / 2048 = 15.23 per kg
**********
4096 kg (one 20-foot container) - 31,196.83 x 1.8 = 56,154.29 USD / 36,500.29 British pound
56,154.29 USD / 4096 = 13.70 per kg