A manufacturing company uses two raw materials, Material A and Material B, to produce its products. The cost of Material A is $x$ dollars per unit, and the cost of Material B is $y$ dollars per unit.

Last month, the company used 15 units of Material A and 20 units of Material B, incurring a total cost of $1250 for these materials. This month, they used 10 units of Material A and 25 units of Material B, with a total cost of $1300.

Based on these costs, what would be the total cost, in dollars, of purchasing 12 units of Material A and 18 units of Material B?