$\backslash$table$[[$Month$,$Units$],[$April$,2,560],[$May$,2,420],[$June$,2,340]]$

The target ending inventory of finished products is as follows.

$\backslash$table$[[$March $31,2,040],[$April $30,2,200],[$May $31,2,200],[$June $30,2,300]]$

$2$ units of material are required for each unit of finished product. Production for July is estimated at $2,800$ units to start building inventory for the fall sales period. Rensing's policy is to have an inventory of raw materials at the end of each month equal to $50\%$ of the following month's production requirements.

Raw materials are expected to cost $$7$ per unit throughout the period.

Calculate the May raw materials purchases in dollars.

Raw material purchases cost

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