Get most recent row inserted with the least specificity - sql

Question

I'll first explain the data model then the desired results and what I have tried.
I have vehicles and sales tables:
CREATE TABLE VEHICLE
(
ID INT IDENTITY(1,1) NOT NULL PRIMARY KEY,
BRAND INT NOT NULL,
MODEL VARCHAR(255),
VERSION VARCHAR(255),
UNIQUE(BRAND, MODEL, VERSION),
FOREIGN KEY(BRAND) REFERENCES BRAND(ID)
)
CREATE TABLE SALES
(
ID INT IDENTITY(1,1) NOT NULL PRIMARY KEY,
VEHICLE_ID INT NOT NULL,
DATE DATE NOT NULL,
SALE INT NOT NULL,
CREATED_DATE DATETIME NOT NULL DEFAULT GETDATE(),
FOREIGN KEY (VEHICLE_ID) REFERENCES VEHICLE(ID)
)
This way I can insert several entries for the same vehicle for the same date (when I want to update, I insert a new row)
INSERT INTO SALES (VEHICLE_ID, DATE, SALE, USER_ID)
VALUES (1, '2018-01-01', 2, 3) -- then later i update by inserting a new row
(1, '2018-01-01', 4, 3)
I want to retrieve the last sale inserted for a specific date range (using the DATE), then filter for a specific BRAND, or model or version.
I got it working by doing this
SELECT
S.DATE AS date, SUM(S.SALE_PROJECTION) AS saleProjection
FROM
SALE_PROJECTION S,
(SELECT MAX(ID) AS id
FROM SALE_PROJECTION
WHERE DATE >= CAST(#dateStart AS DATE)
AND DATE <= CAST(#dateEnd AS DATE)
GROUP BY DATE, VEHICLE_ID) S_M,
VEHICLE V
WHERE
1 = 1
AND S.ID = S_M.ID
AND S.VEHICLE_ID = V.ID
AND V.BRAND = 1
AND V.MODEL = 'A6'
AND V.VERSION = '1.0'
GROUP BY S.DATE
ORDER BY DATE
The problem is i want to get the sales for the brand 1 that has the least specificity, meaning:
If i have 3 vehicles:
(1, 'A3', '1.0'),
(1, 'A3', '2.0'),
(1, 'A3', null),
(1, null, null);
if i insert a sale (1, 2018-01-01, 2, 3)
if i insert a sale (2, 2018-01-01, 3, 3) -- the sum for 2018-01-01 would be 5
but then insert a sale for (2, 2018-01-01, 3, 3) -- the sum for 2018-01-01 has to be 3, because it's the last inserted with the least specifity
But the oposite must be true as well
if i insert a sale (3, 2018-01-01, 4, 3)
then insert a sale for (1, 2018-01-01, 1, 3)
then insert a sale for (2, 2018-01-01, 1, 3)
the sum for 2018-01-01 has to be 2, because it's the last inserted
The most general combination of Brand, Model, Version has to "hide" the most specific.
Do i need to change my data model? or this is possible?
I can give more examples if needed.
Thanks in advance