PHP MySQL PDF Customization in Dolibarr

We are beginning to use Dolibarr 10.0.1 ([login to view URL]) and need some customization on Proposals, Sales Orders, Invoices, Shipments. The current line items list on Proposals shows: Description Sales tax U.P. (net) Qty Disc. Total (excl.) We need to add the following after Description: HeightFt HeightIn WidthFt WidthIn Area MUnit RateType We need to enter height and width for each line item and want to record Feet and Inches seperately. The Inches field should accept fractions as we measure to 1/16 accuracy, we may enter 4 1/8 or 4 1/16 for example. The Unit should be a drop down for selecting between Sq.ft. or Sqm (Square Feet or Square Meter). Based on either selection, the Area field is to automatically calculated to 2 decimal places. The Area field should be editable. We may overwrite calculated area. However based on Unit selection, that is whenever we update the unit field, it should recalculate as per the sizes entered. RateType field should also be a dropdown selection for selecting either PerArea or PerQty. If PerArea is selected, then the Total (excl.) = U.P. (net) x Qty x Area If PerQty is selected, then the Total (excl.) = U.P. (net) x Qty Note: Tax and Discount to remain as per the existing functionality. On the print/pdf document, the following columns must be displayed after description: HeightFt HeightIn WidthFt WidthIn ItemArea MUnit Qty TotalArea where TotalArea = Qty x Item Area These changes are to be applied on: Proposals, Sales Orders, Invoices, Shipments. The Shipment document only needs to show HeightFt HeightIn WidthFt WidthIn ItemArea MUnit Qty TotalArea Pricing not required to be shown on shipment document. Please quote competitive rate and delivery timelines. Would prefer someone experienced in Dolibarr and PDF customizations. thanks.