sunMAX panels + hardware typically ship from distributors via freight.
Check with the nearest available distributor to verify the cost of freight shipping. There may be additional fees ($25-75+) for lift gate service or to deliver to a residence. The number of panels shipped may play a strategic part in ordering since up to 25 panels may ship on a single pallet, etc.
In the Customer Proposal software, under the Bill of Materials page, estimate the shipping costs to the nearest number value (ex $250.99), then calculate taxes as a percentage (ex. 4%) according to local tax regulations for your distributor and customer locations.
Quote from US Distributor:
"Single panels at UPS base cost....Multiple panels it LTL freight at cost plus $50 pallet fee per 25 panels...Sales Tax is charged for <US_state> customers at 8.25%..."