The following are independent cases which follow. Each case involves

various assumptions as to the amount and type of income earned by John Moss during 2020, as well as to other information that is relevant to the determination of his 2020 Tax Payable. John's Net Income For Tax Purposes is equal to his Taxable Income in all Cases.
 
In those cases where we have assumed that the income was from employment, the employer withheld the maximum EI premium and CPP contribution.
 
Case 1 — John is 58 years old and has employment income of $87,600. His common-law partner is 48 years old and has income of $8,260. They have an adopted child who is 19 years old and lives at home. John and his partner have medical expenses of $4,600. Medical expenses for the son total $10,300. The son has Net Income For Tax Purposes of $4,300.
 
Case 2 —John is 46 years old and has employment income of $160,000. His wife Mary is 41 years old and has Net Income For Tax Purposes of $6,100. They have a 20 year old son who lives at home. He is dependent because of a physical infirmity, but it is not severe enough to qualify him for the disability tax credit. However, he is able to attend university on a full time basis for 8 months during 2020. John pays his tuition fees of $9,400, as well as $720 for the textbooks that he requires in his program. The son has Net Income For Tax Purposes of $8,350. The son agrees to transfer the maximum of his tuition fee amount to John.
 
Case 5 —John is 31 years old, has employment income of $83,000, and makes contributions of $3,000 to registered charities. He is not married and has no dependants.
 
Required: In each Case, calculate the minimum 2020 federal Tax Payable for John Moss. Indicate any carry forwards available to him and his dependants and the carry forward provisions. Ignore any amounts John might have had withheld for taxes or paid in tax instalments and the possibility of pension splitting.