I need help with all the blank/red X spaces

The distribution system for the Herman Company consists of three plants, two warehouses, and four customers. Plant capacities and shipping costs per unit (in $) from each plant to each warehouse are as follows: Plant 1 2 3 Warehouse 2 4 7 8 5 5 6 Capacity 450 600 380 1 3 Warehouse 1 2 Demand 6 3 300 Customer 2 4 6 300 8 7 4 7 300 400 Customer demand and shipping costs per unit (in $) from each warehouse to each customer are as follows: nulate a linear programming model of the problem. For subtractive or negative numbers use a minus sign even if there is a + sign before the blank. Kij represents relation between plants to warehouses or relation between warehouses to customers. VIN 4 X14+ 7 X15+ 8 X24+ 5 X25+ 5 X34+ 6 X35+ 6 X46+ 4 X47+ 5.T. 1) 1 X14 + 1 X15 450 2) 1 X24 + 1 X25