The following table shows the sales of cars of four manufacturers for the period from 2015 to 2020 in a metropolitan city (all the figures are in thousands).

Manufacturer	2015	2016	2017	2018	2019	2020
A	44	48	47	50	52	51
B	40	41	41	41	42	43
C	36	38	40	42	44	50
D	48	44	44	42	42	43

What are the total sales of cars of the four manufacturers under consideration in the city in the entire period of 6 years (from 2015 to 2020)?