excel验证先进先出法公式
=IF(B3<C1,IF(SUM(B3:B4)<C1,IF(SUM(B3:B5)<C1,IF(SUM(B3:B6)<B1,IF(SUM(B3:B7)<C1,"out of range",(B3*C3+B4*C4+B5*C5+B6*C6+(C1-SUM(B3:B6))*C7)/C1),(B3*C3+B4*C4+B5*C5+(C1-SUM(B3:B5))*C6)/C1),(B3*C3+B4*C4+(C1-SUM(B3:B4))*C5)/C1),(B3*C3+(C1-B3)*C4)/C1),C4)
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