When calculating WACC, I think short-term debt is not taken into consideration? For example, let’s say a company has $ 200 long-term debt with cost at 3.5%, $100 short-term debt at 2% and equity of $200 at 1.5% and preferred stock of $100 paying $1 dividend and the tax rate is 30%
So the total firm value=200 of long term debt+200 of quity+100 of PFS=500
Wd=0.4, We=0.4, Wpfs=0.2
WACC=0.4*0.035*0.7+0.4*0.015+0.01*0.2
So the short-term debt is not taken into consideration at all.