Buryecs Co Kaplan Kit

For the Currency Swap part in:
(b)(i). Calculate annual percentage interest saving which Co. could make from using a currency swap. compared with borrowing directly in Wirtonia, Demonstrate how the currency swap will work.

If my answer is like this…
i.Own borrowing(without swap):
B: WBR + 0.6%
C: 5.8%
total: WBR + 6.4%

ii.swap
B: 4%
C:WBR + 0.4%
total : WBR + 4.4%

saving = 2% [B: 60%*2% = 1.2%, C: 40%*2% = 0.8%)
bank fee = 0.5% [ B=0.3%, C= 0.2%]

iii.end result
B: WBR+0.6% -1.2% +0.3% = WBR-0.3%
C: 5.8% – 0.8% +0.2% = 5.2%

1.If i were to show only that, will this already satisfied the requirement of ” Demonstrate how the currency swap will work.” ? (bcs i saw another separate computation in the answer scheme)

2. What does the annual percentage interest saving referred to? Is it required the ‘saving minus bank fee’ to be shown separately? or the answer i shown above has justify it?

I humbly beg for your guidance..(and yes i already watched your lecture video. Just need confirmation for this part)