Below is further information for the questions i am having trouble on:

Rancho Cucamonga Inc. presented the following shareholders' equity information on December 31, 2019.

• Common stock, 50 shares authorized and 30 shares issued: $30
• Additional paid-in-capital, common stock: $60
• Retained earnings: $50
• Treasury stock, 4 shares of common stock: $20

Questions:

What is the total amount of Shareholders' equity? What is the par value per share of common stock?