While I agree with the advice, the math isn't accurate
the rule is there is no need to file If the TOTAL income
is less than EARNED income Plus $350 (not to exceed TOTAL INCOME of $12,200)
AND there is no federal tax withholding
since you daughter's TOTAL income is $1100 and that is less than her earned income of $1083+$350 (or 1433), there is no need to file as long as there was no withholdings
if here numbers were $700 earned and $375 unearned, while it would be less than $1100, there would be a filing requirement since the Total income of $1075 would not be less than the earned income of $700 +350.
The IRS in its infinite wisdom doesn't make it easy for these small numbers
