Please show step by step solution and where each calculation is coming from.

Jonathan owns $60\%$ of Carweb.com Ltd$.,70\%$ of Taxman Inc. and $51\%$ of Internet

Housefind Ltd$.$ The remaining shareholders in all three corporations are unrelated

parties. Each of the three companies earns at least $ $500,000$ of active business income.

Required:

What is the maximum amount of combined corporate business income that the three

companies can claim on their corporation income tax returns, based on only the above

information?

a$)$ $ $1,000,000$

b$)$ $ $-0-$

c$)$ $ $500,000$

d$)$ $ $1,500,000$

e$)$ None of the above