(1) A hirer shall at any time before the final payment under a hire-purchase agreement falls due, be entitled to determine the agreement by giving notice of termination in writing to the owner or any person entitled or authorised to receive the sums payable under the agreement.
(2) Where a hire-purchase agreement has been determined under this section, the hirer shall, without prejudice to any liability which has accrued before termination, have the option to either -
(a) pay the amount, if any, by which one-half of the hire-purchase price exceeds the total of the sums paid and the sums due in respect of the hire-purchase price immediately before termination, or such less amount as may be specified in the agreement, or
(b) purchase the goods by paying the difference between the amount already paid under the agreement and the hire-purchase price after the latter amount has been reduced in accordance with section 52 or 53, or such lesser amount as may be specified in the agreement.
(3) W
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