Bending River Fast Lube does oil changes on vehicles in $15$ minutes or less. The variable cost associated with each oil change is $$15($oil$,$ filter, and $15$ minutes of employee time$).$ The fixed costs of running the shop are $$7,000$ each month $($store manager salary, depreciation on shop and equipment, insurance, and property taxes$).$ The shop has the capacity to perform $4,000$ oil changes each month.

Read the requirements.

Requirement a$.$ Total cost of performing $1,000$ oil changes in May.

Determine the formula, then calculate the current total product cost of performing $1,000$ oil changes in May.

$(,|)=$ Total product cost

$+(,x,)=$