Jamison Corp.'s balance sheet accounts as of December 31, 2021 and 2020 and information relating to 2021 activities are presented below.

December 31,

2021 2020

Assets

Cash $ 440,000 $ 200,000

Short-term investments 600,000

Accounts receivable (net) 1,020,000 1,020,000

Inventory 1,380,000 1,200,000

Long-term investments 400,000 600,000

Plant assets 3,400,000 2,000,000

Accumulated depreciation (900,000) (900,000)

Patent 180,000 200,000

Total assets $6,520,000 $4,320,000

Liabilities and Stockholders' Equity

Accounts payable and accrued liabilities $1,660,000 $1,440,000

Notes payable (nontrade) 580,000

Common stock, $10 par 1,600,000 1,400,000

Additional paid-in capital 800,000 500,000

Retained earnings 1,880,000 980,000

Total liabilities and stockholders' equity $6,520,000 $4,320,000

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Net income for 2021 was $1,500,000.

Cash dividends of $600,000 were declared and paid in 2021.

Equipment costing $1,000,000 and having a carrying amount of $320,000 was sold in 2021 for $360,000.

A long-term investment was sold in 2021 for $320,000. There were no other transactions affecting long-term investments in 2021.

20,000 shares of common stock were issued in 2021 for $25 a share.

Short-term investments consist of treasury bills maturing on 6/30/22.

Net cash used in Jamisons 2021 investing activities was

a. $2,320,000.

b. $1,820,000.

c. $1,680,000.

d. $1,720,000.