Multi-Criteria Budget Lookup

You're a strategy consultant pulling approved budgets from a master spreadsheet that's keyed by three columns at once: Customer × Product × Quarter. None of the three columns is unique on its own — every customer buys multiple products across multiple quarters — so a single-column INDEX/MATCH won't work.

Master at A2:D19: Customer, Product, Quarter, Approved Budget. Three lookups are pre-populated in F2:H4 (Customer, Product, Quarter).

Two valid INDEX/MATCH patterns for composite-key lookup:

• Boolean-AND (recommended): =INDEX($D$2:$D$19, MATCH(1, ($A$2:$A$19=F2)*($B$2:$B$19=G2)*($C$2:$C$19=H2), 0)). The boolean array (=F2)*(=G2)*(=H2) is 1 only on the row where all three conditions match; MATCH finds the position of that 1.
• Concatenation: join the three keys with a separator on both sides — =INDEX($D$2:$D$19, MATCH(F2&"|"&G2&"|"&H2, $A$2:$A$19&"|"&$B$2:$B$19&"|"&$C$2:$C$19, 0)). Works in modern Excel without Ctrl+Shift+Enter; legacy Excel needs array entry.

The boolean-AND pattern is more common in practice because it doesn't depend on a separator that might collide with real data.

Your task:

1. In column I (Budget), write a multi-criteria INDEX/MATCH (or equivalent) that returns the right approved budget for each (Customer, Product, Quarter) tuple.

Graded cells: I2, I3, I4.