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The 87,500 Piece Jigsaw Puzzle

I've been working on this 87,500 piece jigsaw, but I got stuck. Can you help me finish it? Unfortunately, some pieces are missing: I know the shapes of the pieces that I lost, but not how many of each there are. You may need to rotate, but not flip pieces.

Once you finish, I'd appreciate it if you could help me get the missing pieces back by submitting an order form.

Scale: 1x2x5x10x20x

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Missing pieces

Missing Pieces Order Form

Name:

Section 1

a
Quantity of
1a
b
Quantity of
1b
c
Quantity of
1c
d
Quantity of
1d
e
Multiply 1a, 1b, 1c, 1d
1e
f
Take the remainder of 1e divided by 19. This must be 7
1f

Section 2

a
Quantity of
2a
b
Quantity of
2b
c
Quantity of
2c
d
Quantity of
2d
e
Multiply 2a, 2b, 2c, 2d
2e
f
Take the remainder of 2e divided by 19. This must be 0
2f

Section 3

a
Quantity of
3a
b
Quantity of
3b
c
Quantity of
3c
d
Quantity of
3d
e
Multiply 3a, 3b, 3c, 3d
3e
f
Take the remainder of 3e divided by 19. This must be 10
3f

Section 4

a
Quantity of
4a
b
Quantity of
4b
c
Quantity of
4c
d
Quantity of
4d
e
Multiply 4a, 4b, 4c, 4d
4e
f
Take the remainder of 4e divided by 19. This must be 14
4f