Solve the Problem $8.312 \mathrm {~cm}$ Thick He Laminates the Metal Plate with Four More Layers

Solve the problem.
-A machinist has flat metal plate that is $8.312 \mathrm {~cm}$ thick. He laminates the metal plate with four more layers that are $1.718 \mathrm {~cm} , 2.854 \mathrm {~cm} , 4.930 \mathrm {~cm}$ , and $4.291 \mathrm {~cm}$ thick. He then grinds off $3.090 \mathrm {~cm}$ from the top of the plate, then $2.285 \mathrm {~cm}$ more, and finally another $6.925 \mathrm {~cm}$ . Find the new thickness of the plate.

A) $20.555 \mathrm {~cm}$
B) $6.819 \mathrm {~cm}$
C) $9.805 \mathrm {~cm}$
D) $12.895 \mathrm {~cm}$