Which of the following results in a cash inflow?

equity $-$ current year $20,000vs.$ last year $30,000$

building $-$ current year $180,000v.$ last year $150,000$

short$-$term liability $-$ current year $2,000$ vs$.$ last year $1,000$

inventory $-$ current year $30,000v,$ last year $5,000$