Final answer:
The QPIP premiums on regular earnings are calculated by multiplying the regular earnings by the premium rate, making the correct formula: QPIP premium = regular earnings * premium rate.
Step-by-step explanation:
The Quebec Parental Insurance Plan (QPIP) premiums on regular earnings are calculated using a specific formula where the premium amount is derived by multiplying the regular earnings by the premium rate. Hence, the correct formula to calculate the QPIP premium is:
QPIP premium = regular earnings * premium rate