Final answer:
Gabriella's weekly income is approximately $1,442.31, her fortnightly income is approximately $2,884.62, and her monthly income is $6,250.00.
Step-by-step explanation:
To calculate Gabriella's weekly income, divide her annual salary by the number of weeks in a year. Since there are 52 weeks in a year, her weekly income would be $75,000.00 divided by 52, which is approximately $1,442.31 per week.
To calculate her fortnightly income, divide her annual salary by the number of fortnights in a year. Since there are 26 fortnights in a year, her fortnightly income would be $75,000.00 divided by 26, which is approximately $2,884.62 per fortnight.
To calculate her monthly income, divide her annual salary by the number of months in a year. Since there are 12 months in a year, her monthly income would be $75,000.00 divided by 12, which is $6,250.00 per month.