Ade Company Limited has an authorized capital of 80,000 shares of N20 each, out of which 30,000 shares have been fully subscribed by the public and allotted as at 31st March 2006. Other assets and liabilities were:

Creditors     35,000
Motor van    90,000
Buildings      65,000
Stock            60,000
Debtors        15,000
Cash              5,000 
You are required to calculate:
(a) Issued capital 
(b) Unissued capital
(c) Total Assets
(d) Working capital.