\n2.\tPK invoice\n\tfile_number\n\tclient_name\n\tdate\n\trevenue_branch\n\trevenue_type\n\trevenue_usd\n\t\n\t\n\tshipment\t\n   PK shipment_id\n\torigin_branch\n\tdestination_branch\n\tmonth_number\n\tweight_kg\n\t\n\t2. 1. How much revenue is generated on how many shipments (shipment_id) and weights moved in each quarter (just call them Q1, Q2, Q3, and Q4, don\'t worry about year)?

\n2.\tPK invoice\n\tfile_number\n\tclient_name\n\tdate\n\trevenue_branch\n\trevenue_type\n\trevenue_usd\n\t\n\t\n\tshipment\t\n   PK shipment_id\n\torigin_branc