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Stadera

la bilancia del mercante

A stadera is the steelyard balance a Renaissance merchant carried to weigh goods. This one does both halves of the job: it weighs the baggage and it balances the books — purchase cost, exchange rate, jastip fee, profit, margin.

The financial rule it is built around: once a purchase is confirmed, the exchange rate that settled it is frozen. Refreshing today's rate can never move last month's profit.

Seller mode. Everything you enter is stored in this browser only — no account, no server. That means it works with no signal, and it also means clearing site data wipes it. Export from the Invoice tab before you rely on it.

Trip

Japan Trip — Tokyo

2026-08-20 → 2026-08-27 · Garuda Indonesia GA 874 · Fee: 10% of purchase

Revenue (est.)
Rp5.793.620
Purchase cost
Rp5.244.200
Jastip fee revenue
Rp524.420
Business expenses
Rp938.260
Net profit
-Rp413.840
Revenue − purchase − pass-through − business expenses
Margin
-7.1%
Outstanding
Rp4.793.620
Items purchased
1 / 4
3 still to buy

Baggage

1.2 / 23 kg21.8 kg left

Exchange rate

JPY → IDRIdle
IDR per 1 JPY
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