Ms$.$ Ima began her retail business on March $1,2021$ in Ontario. The quarterly sale of taxable supplies are as follows: $($See picture attached$)$

On February $18$th $2022,$ Ms$.$ Ima made a large $$25,000$ sale to a corporate customer. She had $$6,000$ of sales in $2022$ prior to February $18$th$.$

REQUIRED

a$)$ Determine the date that she is required to start collecting HST given the information above.

b$)$ Assume that sales from October to December $2021$ was only $$6,000.$ Repeat part a$)$