Calvin has the following in 2021: Revenue from his hobby $20,000; cost of goods sold related to the hobby $7,000; supplies for his hobby $10,000; studio rental for his hobby $5,000 and other expenses related to the hobby $1,000. What will be Calvins gross income from his hobby and his deductible expenses from his hobby

Group of answer choices

a. $20,000 and $20,000

b. $13,000 and $13,000

c. $20,000 and $0

d. $13,000 and $0