Help to improve my costing calculator for flooring business

Ive been working on this sheet for a couple of years and I have reduced the entrys to price the jobs down to a select few.


My goal is to be able to enter in product/m2 and travel time/kms and then it uses all the other information to calculate the entire job ( dats, staff, product cost etc.

Can you please have a look and suggest anything that i could improve ? I am new to this so i am at the stage i need to learn tables etc properly.

Can you help me reach my goal