Behind the result - No mystery in the method
Each line uses cost j = first cost + (j − 1) × entered increase. For n purchases, the total is n × first + increase × n × (n − 1) ÷ 2. Line totals are added in the one selected currency label and compared with budget plus any reserve. A zero purchase count contributes no cost. A blank label is omitted from entered inputs and replaced by a neutral line heading. The worksheet does not verify the actual upgrade system, currency, level caps, prerequisite order or reward availability; it applies your linear series even when a real game progression would follow different rules.
Blank optional fields are omitted from the entered-input summary. Text is displayed literally, not interpreted as HTML.
Editing inputs clears the previous result. Build again before exporting. Download text creates a .txt copy; Print / Save PDF uses your browser. Review optional notes before sharing.
Before you go
Are these the real Legacy upgrade costs or currencies?
No. Costs, increments, counts and currency are your planning assumptions. Check the actual system shown in your official-game context. The selector does not prove that any chosen upgrade uses gold, gems, points or tokens.
Can it handle costs that do not increase by a fixed amount?
Not as one line. Each line is an arithmetic series with a constant non-negative increase. Use separate lines for suitable parts of a sequence, or calculate a different pattern yourself; the tool does not silently invent a progression.
Can I plan several upgrade lines together?
Yes. Enter up to three lines in the same selected currency. Each line has a count, first cost and constant increase; the result shows every purchase and the combined total.
Can I mix gold and points in the same total?
No. Every line uses the one selected label. Different resources should be planned separately; there is no exchange-rate or conversion mechanic here. The print/text result keeps the chosen label visible.