calculate (something) into (something)
To include a particular amount as one does calculations. When you submit your travel expenses for reimbursement, be sure to calculate gas into the total. Wait, I didn't calculate the tip into each person's total, so we need to give the server more money.
calculate on (something)
To consider or think about something. He'll have an answer for you soon—he's been calculating on your offer for days.
calculate on something
Rur. to think about or plan on something. Let me calculate on this a little bit. He's busy calculating on a serious problem.
calculate something into something
and calculate something into include something in one's calculations. Did you calculate the cost of the cake into the total? Yes, I calculated in all the costs.