The transaction fees charged by the credit and debit card issuers are as follows:

Credit cards: $$0\mathrm{.}60$ per transaction $+5\%$ of the amount charged

Debit cards: $$0\mathrm{.}55$ per transaction $+4\%$ of the amount charged

Read the requirements.

Requirement $1.$ How much of the total sales revenue is expected to be paid in cash?

The total sales revenue expected to be paid in cash is