Solution:

405

For an explanation, watch the video.

Solution:

38.

Watch the video for an explanation.

Solution:

51

For Explanation, Watch the video.

Solution:

D & C.

For details, Please check the video.

Solution:

It can be done as shown in the video below.

Solution:

75.

For a detailed explanation, please watch the video.

Solution:

16

Watch Video for more explanation.

Solution:

30.

For Explanation, watch video

Solution:

It can be done as shown in the picture below. You can also watch video For more explanation.

Solution:

$2000

Explanation:
Profit from 1st transaction = $1000 (23000-22000)
Profit from 2nd transaction = $1000 (24000-24000)

So the overall profit will be = $2000.