What is the additional charge applied for travel beyond 100.0 km from the Architect's office?

The additional charge of 60% of the total amount is applied for travel that exceeds 100.0 km from the Architect's office. This percentage reflects a standard practice in architectural fees, particularly when travel requirements demand considerable time and resource commitment beyond a specified distance.

In professional settings, additional charges account for factors such as increased transportation costs, longer travel time, and the additional logistical planning that may be necessary for more distant projects. By establishing a clear percentage for travel beyond a certain threshold, it ensures transparency and fairness in the billing process, allowing clients to understand the extra expenses incurred due to increased distances.

The other options presented involve lower percentages, which might not adequately reflect the actual costs and efforts associated with extensive travel. Establishing the charge at 60% recognizes the significant impact that substantial travel distances can have on project management and execution.