Please help me to complete the question.

Exercise $13-55($Static$)$ Critiques of Traditional Budgeting $--$ Zero$-$Based Budgeting $($LO $13-9)$

Refer to the information in Exhibits $13\mathrm{.}20$ and $13\mathrm{.}21$ that are part of the test of zero$-$based budgeting at Rainy Days Umbrellas. Information concerning the funding requests for PDG Areas $2$ and $3$ are as follows:

PDG Area $2$ PackageFunding RequestPDG Area $3$ PackageFunding Request$2-1$$ $48,0003-1$$ $16,0002-230,0003-235,0002-326,0003-329,0002-435,0003-417,0002-521,000$

Required:

To what level or levels would funding for Product Development Group have to drop such that one, but only one, of the PDG Areas received no funding?