Hi,

As computation method does not allow to mix lines, it will cover the time period "using single line" from the cheapest way. 

So it would be 3x   3days= 110$ = 330$.

Thanks

From my point of view 

1 day = $50
3 days = $110
1 week = $200

Calculating the cheapest cost:

1 week (7 days) = $200
1 additional day = $50

Total cost for 8 days = $200 (1 week) + $50 (1 additional day) = $250

I am seeing from the questions that the answer is $330 , which is very confusing. From my standpoint, that means that Odoo is calculating for 9 days (each 3 days = $110, making a total of $330), not for the 8 days.

Is it something that will be change so mix lines will be allowed in the future?

Indeed, from a business standpoint, I'm having a hard time understanding why we wouldn't be able to offer special pricing to a customer. In this case this pricing would be:

1 week + 1 day=> 200$ + 50$ = 250$

I understand now based on the answers how this is calculated but this method is really not ideal

So basically in the case of question 3 in real life I have to tell the customer we have to make 2 rental orders

1 weekly 200$ and 1 daily 50$ and in total the customer will pay 250$

but if I let Odoo do the calculation the customer will pay 3x110$=330$. 

Explain that logic to any person, as it stands this is not a good calculation method

Odoo has given two rules. 

1. pick only one price 

2. pick the most cheapest price 

where these two conditions will be fulfilled that price will be final. 

so we will apply the price in 3 situations and pick the cheapest option. 

1.  1 day =50$,   8 days = 50$*8=400$

2. 3 days=110$, 9 days= 110*3= 330$ (here we can't break into 8 days so we have to pick multiple only)

3. 1 week= 200$ 2weeks= 200*2=400$ (again we can't separate days from weeks and have to pick multiple in which that time period falls. 

so the cheapest option is 2. 

330$ top cours I get many xp

We have to follow a single streamline to do this. Pick up which full fills for your condition.