The Information That Follows Pertains to Stockholders' Equity Data of the Keswick

The information that follows pertains to stockholders' equity data of the Keswick Corporation on December 31,20xx.Compute the amount of each item indicated by a letter in the listing below.Round answers to two decimal places.
$\begin{array}{llr} \text { Par value per common share } &\$20\\ \text { Balance of Common Stock account } &\$\text {a}\\\\ \text {No. of shares authorized } &20,000\\ \text { No. of shares issued and outstanding } &150,000 \\ \text { Balance of Additional Paid-in Capital account }&\text { \$b } \\\\\text {Balance of Retained Earnings account}&\$50,000\\\text {Total contributed capital}&\$ \text { c}\\\\\text {Total stockholders' equity}& \$ 510,000 \end{array}$