Answer:
1548 
Step-by-step explanation:
Split the figure into two rectangles:
top rectangle:
10 ft x 6 ft x 3 ft
bottom rectangle:
19 ft x 12 ft x 6 ft
Find the volume of both rectangles using this formula:
V = length × width × height
Volume of top rectangle:
V = 10 × 6 × 3
V = 180 
Volume of bottom rectangle:
V = 19 × 12 × 6
V = 1368 
For the total volume of the figure, add up both volumes of the two rectangles:
180
+ 1368
= 1548 