Answer:
$700
Step-by-step explanation:
Data provided in the question:
Formula for gross income
gross income = total of all incomes added together
Cash = $100,
Checks = $200,
Credit Card Charges = $400
Now,
gross income according to the given formula will be
Gross income = Cash + Checks + Credit Card Charges
or
Gross income = $100 + $200 + $400
or
Gross income = $700